231029520218 has 16 divisors (see below), whose sum is σ = 396062654400. Its totient is φ = 99009639456.

The previous prime is 231029520167. The next prime is 231029520221. The reversal of 231029520218 is 812025920132.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 261758 + ... + 728406.

It is an arithmetic number, because the mean of its divisors is an integer number (24753915900).

Almost surely, 2^231029520218 is an apocalyptic number.

231029520218 is a deficient number, since it is larger than the sum of its proper divisors (165033134182).

231029520218 is a wasteful number, since it uses less digits than its factorization.

231029520218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502021.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 231029520218 in words is "two hundred thirty-one billion, twenty-nine million, five hundred twenty thousand, two hundred eighteen".