55165013 has 4 divisors (see below), whose sum is σ = 55180128. Its totient is φ = 55149900.

The previous prime is 55165003. The next prime is 55165021. The reversal of 55165013 is 31056155.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55165013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688 + ... + 10638.

It is an arithmetic number, because the mean of its divisors is an integer number (13795032).

Almost surely, 2^55165013 is an apocalyptic number.

It is an amenable number.

55165013 is a deficient number, since it is larger than the sum of its proper divisors (15115).

55165013 is an equidigital number, since it uses as much as digits as its factorization.

55165013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15114.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55165013 is about 7427.3153292425. The cubic root of 55165013 is about 380.6751915624.

The spelling of 55165013 in words is "fifty-five million, one hundred sixty-five thousand, thirteen".