131161566 has 16 divisors (see below), whose sum is σ = 266018688. Its totient is φ = 43104600.

The previous prime is 131161549. The next prime is 131161573. The reversal of 131161566 is 665161131.

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, 153520 + ... + 154371.

It is an arithmetic number, because the mean of its divisors is an integer number (16626168).

Almost surely, 2^131161566 is an apocalyptic number.

131161566 is an abundant number, since it is smaller than the sum of its proper divisors (134857122).

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

131161566 is a wasteful number, since it uses less digits than its factorization.

131161566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307967.

The product of its digits is 3240, while the sum is 30.

The square root of 131161566 is about 11452.5790108604. The cubic root of 131161566 is about 508.0840143561.

The spelling of 131161566 in words is "one hundred thirty-one million, one hundred sixty-one thousand, five hundred sixty-six".