55255290 has 64 divisors (see below), whose sum is σ = 137168640. Its totient is φ = 14236160.

The previous prime is 55255283. The next prime is 55255303. The reversal of 55255290 is 9255255.

55255290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205276 + ... + 205544.

It is an arithmetic number, because the mean of its divisors is an integer number (2143260).

Almost surely, 2^55255290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55255290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68584320).

55255290 is an abundant number, since it is smaller than the sum of its proper divisors (81913350).

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

55255290 is a wasteful number, since it uses less digits than its factorization.

55255290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

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

The square root of 55255290 is about 7433.3902090500. The cubic root of 55255290 is about 380.8827354552.

The spelling of 55255290 in words is "fifty-five million, two hundred fifty-five thousand, two hundred ninety".