231697437855 has 32 divisors (see below), whose sum is σ = 410022588864. Its totient is φ = 110983550976.

The previous prime is 231697437841. The next prime is 231697437871. The reversal of 231697437855 is 558734796132.

It is a happy number.

It is not a de Polignac number, because 231697437855 - 2¹⁷ = 231697306783 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16049434 + ... + 16063863.

It is an arithmetic number, because the mean of its divisors is an integer number (12813205902).

Almost surely, 2^231697437855 is an apocalyptic number.

231697437855 is a deficient number, since it is larger than the sum of its proper divisors (178325151009).

231697437855 is a wasteful number, since it uses less digits than its factorization.

231697437855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32113355.

The product of its digits is 38102400, while the sum is 60.

The spelling of 231697437855 in words is "two hundred thirty-one billion, six hundred ninety-seven million, four hundred thirty-seven thousand, eight hundred fifty-five".