131641591 has 16 divisors (see below), whose sum is σ = 142067520. Its totient is φ = 121538560.

The previous prime is 131641579. The next prime is 131641607. The reversal of 131641591 is 195146131.

It is a cyclic number.

It is not a de Polignac number, because 131641591 - 2⁷ = 131641463 is a prime.

It is a super-2 number, since 2×131641591² = 34659016962022562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131641511) 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 15 ways as a sum of consecutive naturals, for example, 252411 + ... + 252931.

It is an arithmetic number, because the mean of its divisors is an integer number (8879220).

Almost surely, 2^131641591 is an apocalyptic number.

131641591 is a deficient number, since it is larger than the sum of its proper divisors (10425929).

131641591 is a wasteful number, since it uses less digits than its factorization.

131641591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its digits is 3240, while the sum is 31.

The square root of 131641591 is about 11473.5169411999. The cubic root of 131641591 is about 508.7030882376.

The spelling of 131641591 in words is "one hundred thirty-one million, six hundred forty-one thousand, five hundred ninety-one".