56131656 has 96 divisors (see below), whose sum is σ = 166212000. Its totient is φ = 15746304.

The previous prime is 56131619. The next prime is 56131657. The reversal of 56131656 is 65613165.

56131656 = T₁₆₈ + T₁₆₉ + ... + T₆₉₈.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (56131657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68980 + ... + 69788.

It is an arithmetic number, because the mean of its divisors is an integer number (1731375).

Almost surely, 2^56131656 is an apocalyptic number.

56131656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56131656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83106000).

56131656 is an abundant number, since it is smaller than the sum of its proper divisors (110080344).

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

56131656 is a wasteful number, since it uses less digits than its factorization.

56131656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 880 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 56131656 is about 7492.1062459098. The cubic root of 56131656 is about 382.8858219826.

The spelling of 56131656 in words is "fifty-six million, one hundred thirty-one thousand, six hundred fifty-six".