231816536 has 16 divisors (see below), whose sum is σ = 496749840. Its totient is φ = 99349920.

The previous prime is 231816527. The next prime is 231816631. The reversal of 231816536 is 635618132.

It is a junction number, because it is equal to n+sod(n) for n = 231816496 and 231816505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069735 + ... + 2069846.

It is an arithmetic number, because the mean of its divisors is an integer number (31046865).

Almost surely, 2^231816536 is an apocalyptic number.

It is an amenable number.

231816536 is an abundant number, since it is smaller than the sum of its proper divisors (264933304).

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

231816536 is a wasteful number, since it uses less digits than its factorization.

231816536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139594 (or 4139590 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 231816536 is about 15225.5225197692. The cubic root of 231816536 is about 614.3013512927.

The spelling of 231816536 in words is "two hundred thirty-one million, eight hundred sixteen thousand, five hundred thirty-six".