131505418 has 16 divisors (see below), whose sum is σ = 215375040. Its totient is φ = 59724000.

The previous prime is 131505383. The next prime is 131505457. The reversal of 131505418 is 814505131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37963 + ... + 41281.

It is an arithmetic number, because the mean of its divisors is an integer number (13460940).

Almost surely, 2^131505418 is an apocalyptic number.

131505418 is a deficient number, since it is larger than the sum of its proper divisors (83869622).

131505418 is a wasteful number, since it uses less digits than its factorization.

131505418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 131505418 is about 11467.5811747726. The cubic root of 131505418 is about 508.5276231124.

The spelling of 131505418 in words is "one hundred thirty-one million, five hundred five thousand, four hundred eighteen".