231387321610 has 32 divisors (see below), whose sum is σ = 429725217600. Its totient is φ = 89647847040.

The previous prime is 231387321587. The next prime is 231387321617. The reversal of 231387321610 is 16123783132.

It is a self number, because there is not a number n which added to its sum of digits gives 231387321610.

It is not an unprimeable number, because it can be changed into a prime (231387321617) 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, 1973080 + ... + 2087059.

It is an arithmetic number, because the mean of its divisors is an integer number (13428913050).

Almost surely, 2^231387321610 is an apocalyptic number.

231387321610 is a deficient number, since it is larger than the sum of its proper divisors (198337895990).

231387321610 is a wasteful number, since it uses less digits than its factorization.

231387321610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060326.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 231387321610 in words is "two hundred thirty-one billion, three hundred eighty-seven million, three hundred twenty-one thousand, six hundred ten".