55165506 has 16 divisors (see below), whose sum is σ = 120361248. Its totient is φ = 16716800.

The previous prime is 55165501. The next prime is 55165507. The reversal of 55165506 is 60556155.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 7 ways as a sum of consecutive naturals, for example, 417855 + ... + 417986.

It is an arithmetic number, because the mean of its divisors is an integer number (7522578).

Almost surely, 2^55165506 is an apocalyptic number.

55165506 is an abundant number, since it is smaller than the sum of its proper divisors (65195742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55165506 is a wasteful number, since it uses less digits than its factorization.

55165506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835857.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55165506 is about 7427.3485174724. The cubic root of 55165506 is about 380.6763255681.

It can be divided in two parts, 55 and 165506, that added together give a palindrome (165561).

The spelling of 55165506 in words is "fifty-five million, one hundred sixty-five thousand, five hundred six".