55165825 has 36 divisors (see below), whose sum is σ = 80874288. Its totient is φ = 37003200.

The previous prime is 55165823. The next prime is 55165907. The reversal of 55165825 is 52856155.

It is not a de Polignac number, because 55165825 - 2¹ = 55165823 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55165823) 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 35 ways as a sum of consecutive naturals, for example, 45882 + ... + 47068.

It is an arithmetic number, because the mean of its divisors is an integer number (2246508).

Almost surely, 2^55165825 is an apocalyptic number.

55165825 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55165825 is a deficient number, since it is larger than the sum of its proper divisors (25708463).

55165825 is a wasteful number, since it uses less digits than its factorization.

55165825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1216 counting only the distinct ones).

The product of its digits is 60000, while the sum is 37.

The square root of 55165825 is about 7427.3699921305. The cubic root of 55165825 is about 380.6770593328.

The spelling of 55165825 in words is "fifty-five million, one hundred sixty-five thousand, eight hundred twenty-five".