55523161 has 4 divisors (see below), whose sum is σ = 55551924. Its totient is φ = 55494400.

The previous prime is 55523147. The next prime is 55523203. The reversal of 55523161 is 16132555.

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 6031936 + 49491225 = 2456^2 + 7035^2 .

It is a cyclic number.

It is not a de Polignac number, because 55523161 - 2⁵ = 55523129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55523131) 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, 11260 + ... + 15421.

It is an arithmetic number, because the mean of its divisors is an integer number (13887981).

Almost surely, 2^55523161 is an apocalyptic number.

It is an amenable number.

55523161 is a deficient number, since it is larger than the sum of its proper divisors (28763).

55523161 is a wasteful number, since it uses less digits than its factorization.

55523161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28762.

The product of its digits is 4500, while the sum is 28.

The square root of 55523161 is about 7451.3865152735. The cubic root of 55523161 is about 381.4972347463.

It can be divided in two parts, 555 and 23161, that added together give a square (23716 = 154²).

The spelling of 55523161 in words is "fifty-five million, five hundred twenty-three thousand, one hundred sixty-one".