55475280 has 200 divisors, whose sum is σ = 220378752. Its totient is φ = 12669696.

The previous prime is 55475261. The next prime is 55475311. The reversal of 55475280 is 8257455.

It is a happy number.

55475280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 44749 + ... + 45971.

Almost surely, 2^55475280 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 55475280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110189376).

55475280 is an abundant number, since it is smaller than the sum of its proper divisors (164903472).

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

55475280 is a wasteful number, since it uses less digits than its factorization.

55475280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55475280 is about 7448.1729303232. The cubic root of 55475280 is about 381.3875404490.

It can be divided in two parts, 55475 and 280, that added together give a palindrome (55755).

The spelling of 55475280 in words is "fifty-five million, four hundred seventy-five thousand, two hundred eighty".