131503664 has 20 divisors (see below), whose sum is σ = 255377256. Its totient is φ = 65599872.

The previous prime is 131503663. The next prime is 131503667. The reversal of 131503664 is 466305131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131503663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189 + ... + 16364.

Almost surely, 2^131503664 is an apocalyptic number.

It is an amenable number.

131503664 is a deficient number, since it is larger than the sum of its proper divisors (123873592).

131503664 is a wasteful number, since it uses less digits than its factorization.

131503664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19004 (or 18998 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 131503664 is about 11467.5046980588. The cubic root of 131503664 is about 508.5253622134.

Adding to 131503664 its reverse (466305131), we get a palindrome (597808795).

The spelling of 131503664 in words is "one hundred thirty-one million, five hundred three thousand, six hundred sixty-four".