131438732 has 12 divisors (see below), whose sum is σ = 242124120. Its totient is φ = 62260416.

The previous prime is 131438731. The next prime is 131438737. The reversal of 131438732 is 237834131.

It is a super-2 number, since 2×131438732² = 34552280539535648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131438731) 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, 864653 + ... + 864804.

It is an arithmetic number, because the mean of its divisors is an integer number (20177010).

Almost surely, 2^131438732 is an apocalyptic number.

It is an amenable number.

131438732 is a deficient number, since it is larger than the sum of its proper divisors (110685388).

131438732 is a wasteful number, since it uses less digits than its factorization.

131438732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729480 (or 1729478 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 131438732 is about 11464.6732181951. The cubic root of 131438732 is about 508.4416509718.

The spelling of 131438732 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, seven hundred thirty-two".