131583621 has 32 divisors (see below), whose sum is σ = 208776960. Its totient is φ = 72889344.

The previous prime is 131583619. The next prime is 131583631. The reversal of 131583621 is 126385131.

It is not a de Polignac number, because 131583621 - 2¹ = 131583619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131583631) 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 31 ways as a sum of consecutive naturals, for example, 10935 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (6524280).

Almost surely, 2^131583621 is an apocalyptic number.

It is an amenable number.

131583621 is a deficient number, since it is larger than the sum of its proper divisors (77193339).

131583621 is a wasteful number, since it uses less digits than its factorization.

131583621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8685.

The product of its digits is 4320, while the sum is 30.

The square root of 131583621 is about 11470.9904105966. The cubic root of 131583621 is about 508.6284060455.

The spelling of 131583621 in words is "one hundred thirty-one million, five hundred eighty-three thousand, six hundred twenty-one".