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10200131231 = 82912304139
BaseRepresentation
bin10010111111111100…
…11010011010011111
3222022212100100120012
421133332122122133
5131342213144411
64404052113435
7510524453633
oct113776323237
928285310505
1010200131231
114364787624
121b8800587b
13c672bc414
146ca97adc3
153ea74118b
hex25ff9a69f

10200131231 has 4 divisors (see below), whose sum is σ = 10212436200. Its totient is φ = 10187826264.

The previous prime is 10200131219. The next prime is 10200131239. The reversal of 10200131231 is 13213100201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-10200131231 is a prime.

It is a super-2 number, since 2×102001312312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200131239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6151241 + ... + 6152898.

It is an arithmetic number, because the mean of its divisors is an integer number (2553109050).

Almost surely, 210200131231 is an apocalyptic number.

10200131231 is a deficient number, since it is larger than the sum of its proper divisors (12304969).

10200131231 is an equidigital number, since it uses as much as digits as its factorization.

10200131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12304968.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 10200131231 its reverse (13213100201), we get a palindrome (23413231432).

The spelling of 10200131231 in words is "ten billion, two hundred million, one hundred thirty-one thousand, two hundred thirty-one".

Divisors: 1 829 12304139 10200131231