231515380946 has 16 divisors (see below), whose sum is σ = 357318150360. Its totient is φ = 112420897920.

The previous prime is 231515380903. The next prime is 231515380951. The reversal of 231515380946 is 649083515132.

It can be written as a sum of positive squares in 4 ways, for example, as 217005973921 + 14509407025 = 465839^2 + 120455^2 .

It is a super-2 number, since 2×231515380946² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231515380946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2851451 + ... + 2931518.

Almost surely, 2^231515380946 is an apocalyptic number.

231515380946 is a deficient number, since it is larger than the sum of its proper divisors (125802769414).

231515380946 is a wasteful number, since it uses less digits than its factorization.

231515380946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783549.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 231515380946 in words is "two hundred thirty-one billion, five hundred fifteen million, three hundred eighty thousand, nine hundred forty-six".