56552161 has 4 divisors (see below), whose sum is σ = 57931524. Its totient is φ = 55172800.

The previous prime is 56552159. The next prime is 56552191. The reversal of 56552161 is 16125565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9492561 + 47059600 = 3081^2 + 6860^2 .

It is a cyclic number.

It is not a de Polignac number, because 56552161 - 2¹ = 56552159 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (56552191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689620 + ... + 689701.

It is an arithmetic number, because the mean of its divisors is an integer number (14482881).

Almost surely, 2^56552161 is an apocalyptic number.

It is an amenable number.

56552161 is a deficient number, since it is larger than the sum of its proper divisors (1379363).

56552161 is a wasteful number, since it uses less digits than its factorization.

56552161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379362.

The product of its digits is 9000, while the sum is 31.

The square root of 56552161 is about 7520.1170868544. The cubic root of 56552161 is about 383.8395619738.

The spelling of 56552161 in words is "fifty-six million, five hundred fifty-two thousand, one hundred sixty-one".