231369756981 has 16 divisors (see below), whose sum is σ = 339106825728. Its totient is φ = 139153679600.

The previous prime is 231369756967. The next prime is 231369757009. The reversal of 231369756981 is 189657963132.

It is a cyclic number.

It is not a de Polignac number, because 231369756981 - 2⁷ = 231369756853 is a prime.

It is a super-2 number, since 2×231369756981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231369756911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26756001 + ... + 26764646.

It is an arithmetic number, because the mean of its divisors is an integer number (21194176608).

Almost surely, 2^231369756981 is an apocalyptic number.

It is an amenable number.

231369756981 is a deficient number, since it is larger than the sum of its proper divisors (107737068747).

231369756981 is a wasteful number, since it uses less digits than its factorization.

231369756981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53520792.

The product of its digits is 14696640, while the sum is 60.

The spelling of 231369756981 in words is "two hundred thirty-one billion, three hundred sixty-nine million, seven hundred fifty-six thousand, nine hundred eighty-one".