131816534 has 16 divisors (see below), whose sum is σ = 201342240. Its totient is φ = 64713600.

The previous prime is 131816479. The next prime is 131816551. The reversal of 131816534 is 435618131.

It is a self number, because there is not a number n which added to its sum of digits gives 131816534.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 21959 + ... + 27309.

It is an arithmetic number, because the mean of its divisors is an integer number (12583890).

Almost surely, 2^131816534 is an apocalyptic number.

131816534 is a deficient number, since it is larger than the sum of its proper divisors (69525706).

131816534 is a wasteful number, since it uses less digits than its factorization.

131816534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575.

The product of its digits is 8640, while the sum is 32.

The square root of 131816534 is about 11481.1381839955. The cubic root of 131816534 is about 508.9283327832.

The spelling of 131816534 in words is "one hundred thirty-one million, eight hundred sixteen thousand, five hundred thirty-four".