131332404 has 24 divisors (see below), whose sum is σ = 350219968. Its totient is φ = 37523520.

The previous prime is 131332393. The next prime is 131332423. The reversal of 131332404 is 404233131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 781657 + ... + 781824.

Almost surely, 2^131332404 is an apocalyptic number.

131332404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131332404 is an abundant number, since it is smaller than the sum of its proper divisors (218887564).

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

131332404 is a wasteful number, since it uses less digits than its factorization.

131332404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563495 (or 1563493 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 131332404 is about 11460.0350784803. The cubic root of 131332404 is about 508.3045118718.

Adding to 131332404 its reverse (404233131), we get a palindrome (535565535).

The spelling of 131332404 in words is "one hundred thirty-one million, three hundred thirty-two thousand, four hundred four".