131557542 has 16 divisors (see below), whose sum is σ = 264859392. Its totient is φ = 43561800.

The previous prime is 131557513. The next prime is 131557567. The reversal of 131557542 is 245755131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71698 + ... + 73509.

It is an arithmetic number, because the mean of its divisors is an integer number (16553712).

Almost surely, 2^131557542 is an apocalyptic number.

131557542 is an abundant number, since it is smaller than the sum of its proper divisors (133301850).

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

131557542 is a wasteful number, since it uses less digits than its factorization.

131557542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145363.

The product of its digits is 21000, while the sum is 33.

The square root of 131557542 is about 11469.8536172002. The cubic root of 131557542 is about 508.5948015677.

The spelling of 131557542 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, five hundred forty-two".