131566356 has 60 divisors (see below), whose sum is σ = 355062400. Its totient is φ = 42437520.

The previous prime is 131566333. The next prime is 131566361. The reversal of 131566356 is 653665131.

131566356 is a `hidden beast` number, since 1 + 3 + 15 + 6 + 635 + 6 = 666.

It is a super-2 number, since 2×131566356² = 34619412062237472, which contains 22 as substring.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 131566356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3495 + ... + 16593.

Almost surely, 2^131566356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131566356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177531200).

131566356 is an abundant number, since it is smaller than the sum of its proper divisors (223496044).

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

131566356 is a wasteful number, since it uses less digits than its factorization.

131566356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13146 (or 13135 counting only the distinct ones).

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

The square root of 131566356 is about 11470.2378353720. The cubic root of 131566356 is about 508.6061594734.

The spelling of 131566356 in words is "one hundred thirty-one million, five hundred sixty-six thousand, three hundred fifty-six".