55553280 has 288 divisors, whose sum is σ = 201325824. Its totient is φ = 12976128.

The previous prime is 55553269. The next prime is 55553327. The reversal of 55553280 is 8235555.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1501422 + ... + 1501458.

It is an arithmetic number, because the mean of its divisors is an integer number (699048).

Almost surely, 2^55553280 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 55553280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100662912).

55553280 is an abundant number, since it is smaller than the sum of its proper divisors (145772544).

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

55553280 is a wasteful number, since it uses less digits than its factorization.

55553280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 87 counting only the distinct ones).

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

The square root of 55553280 is about 7453.4072745289. The cubic root of 55553280 is about 381.5662043916.

It can be divided in two parts, 555 and 53280, that added together give a palindrome (53835).

The spelling of 55553280 in words is "fifty-five million, five hundred fifty-three thousand, two hundred eighty".