131305432 has 16 divisors (see below), whose sum is σ = 246326400. Its totient is φ = 65618400.

The previous prime is 131305423. The next prime is 131305457. The reversal of 131305432 is 234503131.

It is a super-2 number, since 2×131305432² = 34482232945413248, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 20182 + ... + 25882.

It is an arithmetic number, because the mean of its divisors is an integer number (15395400).

Almost surely, 2^131305432 is an apocalyptic number.

It is an amenable number.

131305432 is a deficient number, since it is larger than the sum of its proper divisors (115020968).

131305432 is a wasteful number, since it uses less digits than its factorization.

131305432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586 (or 8582 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 131305432 is about 11458.8582328258. The cubic root of 131305432 is about 508.2697123161.

Adding to 131305432 its reverse (234503131), we get a palindrome (365808563).

The spelling of 131305432 in words is "one hundred thirty-one million, three hundred five thousand, four hundred thirty-two".