231579642 has 32 divisors (see below), whose sum is σ = 532588032. Its totient is φ = 65757744.

The previous prime is 231579637. The next prime is 231579697. The reversal of 231579642 is 246975132.

It is a self number, because there is not a number n which added to its sum of digits gives 231579642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10068 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (16643376).

Almost surely, 2^231579642 is an apocalyptic number.

231579642 is an abundant number, since it is smaller than the sum of its proper divisors (301008390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231579642 is a wasteful number, since it uses less digits than its factorization.

231579642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002.

The product of its digits is 90720, while the sum is 39.

The square root of 231579642 is about 15217.7410281553. The cubic root of 231579642 is about 614.0920278545.

It can be divided in two parts, 231579 and 642, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 231579642 in words is "two hundred thirty-one million, five hundred seventy-nine thousand, six hundred forty-two".