55125920 has 48 divisors (see below), whose sum is σ = 131430600. Its totient is φ = 21848064.

The previous prime is 55125913. The next prime is 55125937. The reversal of 55125920 is 2952155.

It can be written as a sum of positive squares in 4 ways, for example, as 15335056 + 39790864 = 3916^2 + 6308^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16556 + ... + 19604.

Almost surely, 2^55125920 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 55125920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65715300).

55125920 is an abundant number, since it is smaller than the sum of its proper divisors (76304680).

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

55125920 is a wasteful number, since it uses less digits than its factorization.

55125920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3169 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55125920 is about 7424.6831582230. The cubic root of 55125920 is about 380.5852477666.

The spelling of 55125920 in words is "fifty-five million, one hundred twenty-five thousand, nine hundred twenty".