55255380 has 48 divisors (see below), whose sum is σ = 156234624. Its totient is φ = 14590080.

The previous prime is 55255357. The next prime is 55255381. The reversal of 55255380 is 8355255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55255381) 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 15 ways as a sum of consecutive naturals, for example, 1710 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (3254888).

Almost surely, 2^55255380 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 55255380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78117312).

55255380 is an abundant number, since it is smaller than the sum of its proper divisors (100979244).

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

55255380 is a wasteful number, since it uses less digits than its factorization.

55255380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9056 (or 9054 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 55255380 is about 7433.3962628128. The cubic root of 55255380 is about 380.8829422495.

The spelling of 55255380 in words is "fifty-five million, two hundred fifty-five thousand, three hundred eighty".