131631404 has 24 divisors (see below), whose sum is σ = 233163168. Its totient is φ = 65018880.

The previous prime is 131631403. The next prime is 131631413. The reversal of 131631404 is 404136131.

It is a super-2 number, since 2×131631404² = 34653653038022432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131631404.

It is not an unprimeable number, because it can be changed into a prime (131631403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128414 + ... + 129434.

It is an arithmetic number, because the mean of its divisors is an integer number (9715132).

Almost surely, 2^131631404 is an apocalyptic number.

It is an amenable number.

131631404 is a deficient number, since it is larger than the sum of its proper divisors (101531764).

131631404 is a wasteful number, since it uses less digits than its factorization.

131631404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 131631404 is about 11473.0729972401. The cubic root of 131631404 is about 508.6899660118.

Adding to 131631404 its reverse (404136131), we get a palindrome (535767535).

The spelling of 131631404 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred four".