131408556 has 12 divisors (see below), whose sum is σ = 306619992. Its totient is φ = 43802848.

The previous prime is 131408549. The next prime is 131408581. The reversal of 131408556 is 655804131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5475345 + ... + 5475368.

It is an arithmetic number, because the mean of its divisors is an integer number (25551666).

Almost surely, 2^131408556 is an apocalyptic number.

It is an amenable number.

131408556 is an abundant number, since it is smaller than the sum of its proper divisors (175211436).

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

131408556 is a wasteful number, since it uses less digits than its factorization.

131408556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10950720 (or 10950718 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 131408556 is about 11463.3570999075. The cubic root of 131408556 is about 508.4027382675.

The spelling of 131408556 in words is "one hundred thirty-one million, four hundred eight thousand, five hundred fifty-six".