131808616 has 16 divisors (see below), whose sum is σ = 261679140. Its totient is φ = 62027520.

The previous prime is 131808613. The next prime is 131808623. The reversal of 131808616 is 616808131.

It can be written as a sum of positive squares in 2 ways, for example, as 126472516 + 5336100 = 11246^2 + 2310^2 .

It is a super-2 number, since 2×131808616² = 34747022503670912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (131808613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484455 + ... + 484726.

Almost surely, 2^131808616 is an apocalyptic number.

It is an amenable number.

131808616 is a deficient number, since it is larger than the sum of its proper divisors (129870524).

131808616 is a wasteful number, since it uses less digits than its factorization.

131808616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969204 (or 969200 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 131808616 is about 11480.7933523777. The cubic root of 131808616 is about 508.9181424196.

The spelling of 131808616 in words is "one hundred thirty-one million, eight hundred eight thousand, six hundred sixteen".