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230343131 = 435356817
BaseRepresentation
bin11011011101011…
…00000111011011
3121001102122101002
431232230013123
5432431440011
634505015215
75464612214
oct1556540733
9531378332
10230343131
11109028227
126518450b
133894c515
142284040b
151534ec3b
hexdbac1db

230343131 has 4 divisors (see below), whose sum is σ = 235699992. Its totient is φ = 224986272.

The previous prime is 230343121. The next prime is 230343133. The reversal of 230343131 is 131343032.

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

It is a cyclic number.

It is not a de Polignac number, because 230343131 - 26 = 230343067 is a prime.

It is a super-2 number, since 2×2303431312 = 106115915997766322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230343133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2678366 + ... + 2678451.

It is an arithmetic number, because the mean of its divisors is an integer number (58924998).

Almost surely, 2230343131 is an apocalyptic number.

230343131 is a deficient number, since it is larger than the sum of its proper divisors (5356861).

230343131 is an equidigital number, since it uses as much as digits as its factorization.

230343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356860.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 230343131 is about 15177.0593660300. The cubic root of 230343131 is about 612.9971028163.

Adding to 230343131 its reverse (131343032), we get a palindrome (361686163).

Subtracting from 230343131 its reverse (131343032), we obtain a palindrome (99000099).

The spelling of 230343131 in words is "two hundred thirty million, three hundred forty-three thousand, one hundred thirty-one".

Divisors: 1 43 5356817 230343131