231506506 has 32 divisors (see below), whose sum is σ = 438899328. Its totient is φ = 88957440.

The previous prime is 231506441. The next prime is 231506563. The reversal of 231506506 is 605605132.

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, 946 + ... + 21538.

It is an arithmetic number, because the mean of its divisors is an integer number (13715604).

Almost surely, 2^231506506 is an apocalyptic number.

231506506 is a deficient number, since it is larger than the sum of its proper divisors (207392822).

231506506 is a wasteful number, since it uses less digits than its factorization.

231506506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20686.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 231506506 is about 15215.3378536265. The cubic root of 231506506 is about 614.0273748436.

The spelling of 231506506 in words is "two hundred thirty-one million, five hundred six thousand, five hundred six".