131656536 has 64 divisors (see below), whose sum is σ = 398966400. Its totient is φ = 39895200.

The previous prime is 131656519. The next prime is 131656537. The reversal of 131656536 is 635656131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 131656536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131656537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25330 + ... + 30081.

It is an arithmetic number, because the mean of its divisors is an integer number (6233850).

Almost surely, 2^131656536 is an apocalyptic number.

It is an amenable number.

131656536 is an abundant number, since it is smaller than the sum of its proper divisors (267309864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131656536 is a wasteful number, since it uses less digits than its factorization.

131656536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55437 (or 55427 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 131656536 is about 11474.1682051467. The cubic root of 131656536 is about 508.7223381821.

It can be divided in two parts, 13165 and 6536, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 131656536 in words is "one hundred thirty-one million, six hundred fifty-six thousand, five hundred thirty-six".