231035748561 has 6 divisors (see below), whose sum is σ = 333718303490. Its totient is φ = 154023832368.

The previous prime is 231035748547. The next prime is 231035748589. The reversal of 231035748561 is 165847530132.

It is a happy number.

231035748561 is a `hidden beast` number, since 2 + 3 + 10 + 3 + 5 + 74 + 8 + 561 = 666.

231035748561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149386115025 + 81649633536 = 386505^2 + 285744^2 .

It is not a de Polignac number, because 231035748561 - 2⁵ = 231035748529 is a prime.

It is a super-2 number, since 2×231035748561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231035744561) 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 5 ways as a sum of consecutive naturals, for example, 12835319356 + ... + 12835319373.

Almost surely, 2^231035748561 is an apocalyptic number.

It is an amenable number.

231035748561 is a deficient number, since it is larger than the sum of its proper divisors (102682554929).

231035748561 is a wasteful number, since it uses less digits than its factorization.

231035748561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25670638735 (or 25670638732 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 231035748561 in words is "two hundred thirty-one billion, thirty-five million, seven hundred forty-eight thousand, five hundred sixty-one".