231399640727 has 16 divisors (see below), whose sum is σ = 236821519200. Its totient is φ = 226040740992.

The previous prime is 231399640711. The next prime is 231399640733. The reversal of 231399640727 is 727046993132.

It is a cyclic number.

It is not a de Polignac number, because 231399640727 - 2⁴ = 231399640711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231399640627) 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, 6100673 + ... + 6138485.

It is an arithmetic number, because the mean of its divisors is an integer number (14801344950).

Almost surely, 2^231399640727 is an apocalyptic number.

231399640727 is a deficient number, since it is larger than the sum of its proper divisors (5421878473).

231399640727 is a wasteful number, since it uses less digits than its factorization.

231399640727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38642.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 231399640727 in words is "two hundred thirty-one billion, three hundred ninety-nine million, six hundred forty thousand, seven hundred twenty-seven".