131572540 has 24 divisors (see below), whose sum is σ = 301421232. Its totient is φ = 47844480.

The previous prime is 131572517. The next prime is 131572541. The reversal of 131572540 is 45275131.

It is a happy number.

It is a super-2 number, since 2×131572540² = 34622666564103200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131572499 and 131572508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131572541) by changing a digit.

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, 298809 + ... + 299248.

It is an arithmetic number, because the mean of its divisors is an integer number (12559218).

Almost surely, 2^131572540 is an apocalyptic number.

131572540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131572540 is an abundant number, since it is smaller than the sum of its proper divisors (169848692).

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

131572540 is a wasteful number, since it uses less digits than its factorization.

131572540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598077 (or 598075 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 131572540 is about 11470.5073994135. The cubic root of 131572540 is about 508.6141280030.

The spelling of 131572540 in words is "one hundred thirty-one million, five hundred seventy-two thousand, five hundred forty".