231564116 has 48 divisors (see below), whose sum is σ = 479445120. Its totient is φ = 95800320.

The previous prime is 231564083. The next prime is 231564119. The reversal of 231564116 is 611465132.

It is a happy number.

It is a super-2 number, since 2×231564116² = 107243879637722912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231564119) 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, 106076 + ... + 108236.

It is an arithmetic number, because the mean of its divisors is an integer number (9988440).

Almost surely, 2^231564116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231564116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239722560).

231564116 is an abundant number, since it is smaller than the sum of its proper divisors (247881004).

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

231564116 is a wasteful number, since it uses less digits than its factorization.

231564116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 2302 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 231564116 is about 15217.2308913284. The cubic root of 231564116 is about 614.0783038417.

It can be divided in two parts, 23156 and 4116, that added together give a palindrome (27272).

The spelling of 231564116 in words is "two hundred thirty-one million, five hundred sixty-four thousand, one hundred sixteen".