231591600116 has 6 divisors (see below), whose sum is σ = 405285300210. Its totient is φ = 115795800056.

The previous prime is 231591600113. The next prime is 231591600139. The reversal of 231591600116 is 611006195132.

It can be written as a sum of positive squares in only one way, i.e., 146183875600 + 85407724516 = 382340^2 + 292246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231591600113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28948950011 + ... + 28948950018.

It is an arithmetic number, because the mean of its divisors is an integer number (67547550035).

Almost surely, 2^231591600116 is an apocalyptic number.

It is an amenable number.

231591600116 is a deficient number, since it is larger than the sum of its proper divisors (173693700094).

231591600116 is a wasteful number, since it uses less digits than its factorization.

231591600116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57897900033 (or 57897900031 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

Adding to 231591600116 its reverse (611006195132), we get a palindrome (842597795248).

The spelling of 231591600116 in words is "two hundred thirty-one billion, five hundred ninety-one million, six hundred thousand, one hundred sixteen".