55005280 has 48 divisors (see below), whose sum is σ = 141768144. Its totient is φ = 20001280.

The previous prime is 55005271. The next prime is 55005283. The reversal of 55005280 is 8250055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13867 + ... + 17386.

It is an arithmetic number, because the mean of its divisors is an integer number (2953503).

Almost surely, 2^55005280 is an apocalyptic number.

It is an amenable number.

55005280 is an abundant number, since it is smaller than the sum of its proper divisors (86762864).

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

55005280 is a wasteful number, since it uses less digits than its factorization.

55005280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31279 (or 31271 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 55005280 is about 7416.5544560800. The cubic root of 55005280 is about 380.3074151346.

The spelling of 55005280 in words is "fifty-five million, five thousand, two hundred eighty".