55100925 has 96 divisors (see below), whose sum is σ = 113742720. Its totient is φ = 25920000.

The previous prime is 55100923. The next prime is 55100933. The reversal of 55100925 is 52900155.

It is not a de Polignac number, because 55100925 - 2¹ = 55100923 is a prime.

It is a super-2 number, since 2×55100925² = 6072223871711250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100923) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 304335 + ... + 304515.

It is an arithmetic number, because the mean of its divisors is an integer number (1184820).

Almost surely, 2^55100925 is an apocalyptic number.

55100925 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55100925 is an abundant number, since it is smaller than the sum of its proper divisors (58641795).

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

55100925 is a wasteful number, since it uses less digits than its factorization.

55100925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 55100925 is about 7422.9997305672. Note that the first 3 decimals coincide. The cubic root of 55100925 is about 380.5277178643.

The spelling of 55100925 in words is "fifty-five million, one hundred thousand, nine hundred twenty-five".