131333504 has 16 divisors (see below), whose sum is σ = 261641220. Its totient is φ = 65666688.

The previous prime is 131333443. The next prime is 131333507. The reversal of 131333504 is 405333131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 131333504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131333507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512894 + ... + 513149.

Almost surely, 2^131333504 is an apocalyptic number.

It is an amenable number.

131333504 is a deficient number, since it is larger than the sum of its proper divisors (130307716).

131333504 is an equidigital number, since it uses as much as digits as its factorization.

131333504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026057 (or 1026045 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 131333504 is about 11460.0830712521. The cubic root of 131333504 is about 508.3059310022.

Adding to 131333504 its reverse (405333131), we get a palindrome (536666635).

The spelling of 131333504 in words is "one hundred thirty-one million, three hundred thirty-three thousand, five hundred four".