55057560 has 128 divisors (see below), whose sum is σ = 177059520. Its totient is φ = 13647872.

The previous prime is 55057559. The next prime is 55057567. The reversal of 55057560 is 6575055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55057567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279382 + ... + 279578.

Almost surely, 2^55057560 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 55057560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88529760).

55057560 is an abundant number, since it is smaller than the sum of its proper divisors (122001960).

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

55057560 is a wasteful number, since it uses less digits than its factorization.

55057560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 33.

The square root of 55057560 is about 7420.0781667042. The cubic root of 55057560 is about 380.4278652433.

The spelling of 55057560 in words is "fifty-five million, fifty-seven thousand, five hundred sixty".