131685290 has 32 divisors (see below), whose sum is σ = 261506880. Its totient is φ = 47344000.

The previous prime is 131685289. The next prime is 131685313. The reversal of 131685290 is 92586131.

It is a self number, because there is not a number n which added to its sum of digits gives 131685290.

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 15 ways as a sum of consecutive naturals, for example, 3065 + ... + 16515.

It is an arithmetic number, because the mean of its divisors is an integer number (8172090).

Almost surely, 2^131685290 is an apocalyptic number.

131685290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131685290 is a deficient number, since it is larger than the sum of its proper divisors (129821590).

131685290 is a wasteful number, since it uses less digits than its factorization.

131685290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 131685290 is about 11475.4211251701. The cubic root of 131685290 is about 508.7593707462.

The spelling of 131685290 in words is "one hundred thirty-one million, six hundred eighty-five thousand, two hundred ninety".