131620585 has 4 divisors (see below), whose sum is σ = 157944708. Its totient is φ = 105296464.

The previous prime is 131620523. The next prime is 131620591. The reversal of 131620585 is 585026131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73205136 + 58415449 = 8556^2 + 7643^2 .

It is a cyclic number.

It is not a de Polignac number, because 131620585 - 2⁷ = 131620457 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13162054 + ... + 13162063.

It is an arithmetic number, because the mean of its divisors is an integer number (39486177).

Almost surely, 2^131620585 is an apocalyptic number.

It is an amenable number.

131620585 is a deficient number, since it is larger than the sum of its proper divisors (26324123).

131620585 is an equidigital number, since it uses as much as digits as its factorization.

131620585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26324122.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 131620585 is about 11472.6014922510. The cubic root of 131620585 is about 508.6760289437.

The spelling of 131620585 in words is "one hundred thirty-one million, six hundred twenty thousand, five hundred eighty-five".