131561610 has 32 divisors (see below), whose sum is σ = 329477760. Its totient is φ = 33557568.

The previous prime is 131561609. The next prime is 131561611. The reversal of 131561610 is 16165131.

It is an interprime number because it is at equal distance from previous prime (131561609) and next prime (131561611).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131561611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94645 + ... + 96024.

It is an arithmetic number, because the mean of its divisors is an integer number (10296180).

Almost surely, 2^131561610 is an apocalyptic number.

131561610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131561610 is an abundant number, since it is smaller than the sum of its proper divisors (197916150).

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

131561610 is a wasteful number, since it uses less digits than its factorization.

131561610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190702.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 131561610 is about 11470.0309502634. The cubic root of 131561610 is about 508.6000437410.

The spelling of 131561610 in words is "one hundred thirty-one million, five hundred sixty-one thousand, six hundred ten".