55091163 has 4 divisors (see below), whose sum is σ = 73454888. Its totient is φ = 36727440.

The previous prime is 55091159. The next prime is 55091171. The reversal of 55091163 is 36119055.

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

It is not a de Polignac number, because 55091163 - 2² = 55091159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55091163.

It is not an unprimeable number, because it can be changed into a prime (55091363) 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, 9181858 + ... + 9181863.

It is an arithmetic number, because the mean of its divisors is an integer number (18363722).

Almost surely, 2^55091163 is an apocalyptic number.

55091163 is a deficient number, since it is larger than the sum of its proper divisors (18363725).

55091163 is a wasteful number, since it uses less digits than its factorization.

55091163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18363724.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 55091163 is about 7422.3421505614. The cubic root of 55091163 is about 380.5052443700.

The spelling of 55091163 in words is "fifty-five million, ninety-one thousand, one hundred sixty-three".