55165120 has 112 divisors (see below), whose sum is σ = 139281408. Its totient is φ = 20782080.

The previous prime is 55165091. The next prime is 55165127. The reversal of 55165120 is 2156155.

It is a super-2 number, since 2×55165120² = 6086380929228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55165127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664599 + ... + 664681.

It is an arithmetic number, because the mean of its divisors is an integer number (1243584).

Almost surely, 2^55165120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55165120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69640704).

55165120 is an abundant number, since it is smaller than the sum of its proper divisors (84116288).

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

55165120 is a wasteful number, since it uses less digits than its factorization.

55165120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55165120 is about 7427.3225323800. The cubic root of 55165120 is about 380.6754376859.

The spelling of 55165120 in words is "fifty-five million, one hundred sixty-five thousand, one hundred twenty".