131601975 has 72 divisors (see below), whose sum is σ = 236984832. Its totient is φ = 64363200.

The previous prime is 131601917. The next prime is 131601989. The reversal of 131601975 is 579106131.

It is a happy number.

It is not a de Polignac number, because 131601975 - 2¹⁰ = 131600951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1229872 + ... + 1229978.

It is an arithmetic number, because the mean of its divisors is an integer number (3291456).

Almost surely, 2^131601975 is an apocalyptic number.

131601975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131601975 is a deficient number, since it is larger than the sum of its proper divisors (105382857).

131601975 is a wasteful number, since it uses less digits than its factorization.

131601975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 131601975 is about 11471.7904008049. The cubic root of 131601975 is about 508.6520536993.

The spelling of 131601975 in words is "one hundred thirty-one million, six hundred one thousand, nine hundred seventy-five".