131791972 has 24 divisors (see below), whose sum is σ = 249782400. Its totient is φ = 60482976.

The previous prime is 131791967. The next prime is 131792021. The reversal of 131791972 is 279197131.

It is a super-3 number, since 3×131791972³ (a number of 25 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 2229 + ... + 16387.

It is an arithmetic number, because the mean of its divisors is an integer number (10407600).

Almost surely, 2^131791972 is an apocalyptic number.

It is an amenable number.

131791972 is a deficient number, since it is larger than the sum of its proper divisors (117990428).

131791972 is a wasteful number, since it uses less digits than its factorization.

131791972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14355 (or 14353 counting only the distinct ones).

The product of its digits is 23814, while the sum is 40.

The square root of 131791972 is about 11480.0684666948. The cubic root of 131791972 is about 508.8967204762.

It can be divided in two parts, 13179 and 1972, that added together give a palindrome (15151).

The spelling of 131791972 in words is "one hundred thirty-one million, seven hundred ninety-one thousand, nine hundred seventy-two".