131305772 has 24 divisors (see below), whose sum is σ = 248724000. Its totient is φ = 60293376.

The previous prime is 131305771. The next prime is 131305787. The reversal of 131305772 is 277503131.

It is not an unprimeable number, because it can be changed into a prime (131305771) 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, 4004 + ... + 16692.

It is an arithmetic number, because the mean of its divisors is an integer number (10363500).

Almost surely, 2^131305772 is an apocalyptic number.

It is an amenable number.

131305772 is a deficient number, since it is larger than the sum of its proper divisors (117418228).

131305772 is a wasteful number, since it uses less digits than its factorization.

131305772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12905 (or 12903 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 131305772 is about 11458.8730685002. The cubic root of 131305772 is about 508.2701510173.

The spelling of 131305772 in words is "one hundred thirty-one million, three hundred five thousand, seven hundred seventy-two".