131438172 has 12 divisors (see below), whose sum is σ = 306689096. Its totient is φ = 43812720.

The previous prime is 131438159. The next prime is 131438173. The reversal of 131438172 is 271834131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131438173) 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, 5476579 + ... + 5476602.

Almost surely, 2^131438172 is an apocalyptic number.

131438172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131438172 is an abundant number, since it is smaller than the sum of its proper divisors (175250924).

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

131438172 is a wasteful number, since it uses less digits than its factorization.

131438172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10953188 (or 10953186 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 131438172 is about 11464.6487953186. The cubic root of 131438172 is about 508.4409288921.

The spelling of 131438172 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, one hundred seventy-two".