231665116 has 12 divisors (see below), whose sum is σ = 408509640. Its totient is φ = 114948080.

The previous prime is 231665107. The next prime is 231665141. The reversal of 231665116 is 611566132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220531 + ... + 221578.

It is an arithmetic number, because the mean of its divisors is an integer number (34042470).

Almost surely, 2^231665116 is an apocalyptic number.

It is an amenable number.

231665116 is a deficient number, since it is larger than the sum of its proper divisors (176844524).

231665116 is a wasteful number, since it uses less digits than its factorization.

231665116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442244 (or 442242 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 231665116 is about 15220.5491359543. The cubic root of 231665116 is about 614.1675705420.

It can be divided in two parts, 23166 and 5116, that added together give a palindrome (28282).

The spelling of 231665116 in words is "two hundred thirty-one million, six hundred sixty-five thousand, one hundred sixteen".