55165505 has 4 divisors (see below), whose sum is σ = 66198612. Its totient is φ = 44132400.

The previous prime is 55165501. The next prime is 55165507. The reversal of 55165505 is 50556155.

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 18284176 + 36881329 = 4276^2 + 6073^2 .

It is not a de Polignac number, because 55165505 - 2² = 55165501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55165501) 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, 5516546 + ... + 5516555.

It is an arithmetic number, because the mean of its divisors is an integer number (16549653).

Almost surely, 2^55165505 is an apocalyptic number.

It is an amenable number.

55165505 is a deficient number, since it is larger than the sum of its proper divisors (11033107).

55165505 is a wasteful number, since it uses less digits than its factorization.

55165505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11033106.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55165505 is about 7427.3484501537. The cubic root of 55165505 is about 380.6763232679.

The spelling of 55165505 in words is "fifty-five million, one hundred sixty-five thousand, five hundred five".