231615643 has 16 divisors (see below), whose sum is σ = 279072000. Its totient is φ = 187784352.

The previous prime is 231615623. The next prime is 231615653. The reversal of 231615643 is 346516132.

It is not a de Polignac number, because 231615643 - 2⁵ = 231615611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231615623) 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, 134673 + ... + 136381.

It is an arithmetic number, because the mean of its divisors is an integer number (17442000).

Almost surely, 2^231615643 is an apocalyptic number.

231615643 is a deficient number, since it is larger than the sum of its proper divisors (47456357).

231615643 is a wasteful number, since it uses less digits than its factorization.

231615643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its digits is 12960, while the sum is 31.

The square root of 231615643 is about 15218.9238450030. The cubic root of 231615643 is about 614.1238481265.

The spelling of 231615643 in words is "two hundred thirty-one million, six hundred fifteen thousand, six hundred forty-three".