55057161 has 4 divisors (see below), whose sum is σ = 73409552. Its totient is φ = 36704772.

The previous prime is 55057153. The next prime is 55057181. The reversal of 55057161 is 16175055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55057161 - 2³ = 55057153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55057181) 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, 9176191 + ... + 9176196.

It is an arithmetic number, because the mean of its divisors is an integer number (18352388).

Almost surely, 2^55057161 is an apocalyptic number.

It is an amenable number.

55057161 is a deficient number, since it is larger than the sum of its proper divisors (18352391).

55057161 is a wasteful number, since it uses less digits than its factorization.

55057161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18352390.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 55057161 is about 7420.0512801462. The cubic root of 55057161 is about 380.4269462591.

The spelling of 55057161 in words is "fifty-five million, fifty-seven thousand, one hundred sixty-one".