231039915 has 8 divisors (see below), whose sum is σ = 369663888. Its totient is φ = 123221280.

The previous prime is 231039901. The next prime is 231039917. The reversal of 231039915 is 519930132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-231039915 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (231039917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7701316 + ... + 7701345.

It is an arithmetic number, because the mean of its divisors is an integer number (46207986).

Almost surely, 2^231039915 is an apocalyptic number.

231039915 is a deficient number, since it is larger than the sum of its proper divisors (138623973).

231039915 is a wasteful number, since it uses less digits than its factorization.

231039915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402669.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 231039915 is about 15199.9972039471. The cubic root of 231039915 is about 613.6145825016.

The spelling of 231039915 in words is "two hundred thirty-one million, thirty-nine thousand, nine hundred fifteen".