56551161 has 16 divisors (see below), whose sum is σ = 78368768. Its totient is φ = 36234000.

The previous prime is 56551151. The next prime is 56551211. The reversal of 56551161 is 16115565.

It is not a de Polignac number, because 56551161 - 2¹¹ = 56549113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56551111) 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, 12030 + ... + 16056.

It is an arithmetic number, because the mean of its divisors is an integer number (4898048).

Almost surely, 2^56551161 is an apocalyptic number.

It is an amenable number.

56551161 is a deficient number, since it is larger than the sum of its proper divisors (21817607).

56551161 is a wasteful number, since it uses less digits than its factorization.

56551161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212.

The product of its digits is 4500, while the sum is 30.

The square root of 56551161 is about 7520.0505982340. The cubic root of 56551161 is about 383.8372995090.

The spelling of 56551161 in words is "fifty-six million, five hundred fifty-one thousand, one hundred sixty-one".