131305304 has 32 divisors (see below), whose sum is σ = 272309520. Its totient is φ = 58962816.

The previous prime is 131305303. The next prime is 131305309. The reversal of 131305304 is 403503131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131305303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13214 + ... + 20909.

Almost surely, 2^131305304 is an apocalyptic number.

It is an amenable number.

131305304 is an abundant number, since it is smaller than the sum of its proper divisors (141004216).

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

131305304 is a wasteful number, since it uses less digits than its factorization.

131305304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34179 (or 34175 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 131305304 is about 11458.8526476258. The cubic root of 131305304 is about 508.2695471578.

Adding to 131305304 its reverse (403503131), we get a palindrome (534808435).

The spelling of 131305304 in words is "one hundred thirty-one million, three hundred five thousand, three hundred four".