131445772 has 12 divisors (see below), whose sum is σ = 232802136. Its totient is φ = 64930880.

The previous prime is 131445763. The next prime is 131445773. The reversal of 131445772 is 277544131.

It is not an unprimeable number, because it can be changed into a prime (131445773) 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, 197629 + ... + 198292.

It is an arithmetic number, because the mean of its divisors is an integer number (19400178).

Almost surely, 2^131445772 is an apocalyptic number.

It is an amenable number.

131445772 is a deficient number, since it is larger than the sum of its proper divisors (101356364).

131445772 is a wasteful number, since it uses less digits than its factorization.

131445772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396008 (or 396006 counting only the distinct ones).

The product of its digits is 23520, while the sum is 34.

The square root of 131445772 is about 11464.9802442045. The cubic root of 131445772 is about 508.4507283705.

The spelling of 131445772 in words is "one hundred thirty-one million, four hundred forty-five thousand, seven hundred seventy-two".