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231310312020233 = 614101376664933
BaseRepresentation
bin110100100110000000100000…
…111110110001100100001001
31010100000001100100120011200222
4310212000200332301210021
5220304242004334121413
62135542253530435425
766502422110302355
oct6446004076614411
91110001310504628
10231310312020233
1167780174984a66
1221b395a3592b75
139c0b61302ba84
14411969bd00465
151bb1da3231b08
hexd26020fb1909

231310312020233 has 4 divisors (see below), whose sum is σ = 231310689299268. Its totient is φ = 231309934741200.

The previous prime is 231310312020187. The next prime is 231310312020241. The reversal of 231310312020233 is 332020213013132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63561266491024 + 167749045529209 = 7972532^2 + 12951797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-231310312020233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231310312020283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187718366 + ... + 188946567.

It is an arithmetic number, because the mean of its divisors is an integer number (57827672324817).

Almost surely, 2231310312020233 is an apocalyptic number.

It is an amenable number.

231310312020233 is a deficient number, since it is larger than the sum of its proper divisors (377279035).

231310312020233 is an equidigital number, since it uses as much as digits as its factorization.

231310312020233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377279034.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 231310312020233 its reverse (332020213013132), we get a palindrome (563330525033365).

The spelling of 231310312020233 in words is "two hundred thirty-one trillion, three hundred ten billion, three hundred twelve million, twenty thousand, two hundred thirty-three".

Divisors: 1 614101 376664933 231310312020233