231297434531 has 16 divisors (see below), whose sum is σ = 258422529600. Its totient is φ = 205887187968.

The previous prime is 231297434513. The next prime is 231297434579. The reversal of 231297434531 is 135434792132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231297434531 is a prime.

It is a super-2 number, since 2×231297434531² (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 (231297433531) 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, 3288536 + ... + 3358133.

It is an arithmetic number, because the mean of its divisors is an integer number (16151408100).

Almost surely, 2^231297434531 is an apocalyptic number.

231297434531 is a deficient number, since it is larger than the sum of its proper divisors (27125095069).

231297434531 is a wasteful number, since it uses less digits than its factorization.

231297434531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646798.

The product of its digits is 544320, while the sum is 44.

The spelling of 231297434531 in words is "two hundred thirty-one billion, two hundred ninety-seven million, four hundred thirty-four thousand, five hundred thirty-one".