55571560 has 64 divisors (see below), whose sum is σ = 139034880. Its totient is φ = 19818240.

The previous prime is 55571557. The next prime is 55571567. The reversal of 55571560 is 6517555.

It is not an unprimeable number, because it can be changed into a prime (55571567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22129 + ... + 24511.

It is an arithmetic number, because the mean of its divisors is an integer number (2172420).

Almost surely, 2^55571560 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 55571560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69517440).

55571560 is an abundant number, since it is smaller than the sum of its proper divisors (83463320).

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

55571560 is a wasteful number, since it uses less digits than its factorization.

55571560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2454 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 55571560 is about 7454.6334584606. The cubic root of 55571560 is about 381.6080516975.

It can be divided in two parts, 5557 and 1560, that added together give a palindrome (7117).

The spelling of 55571560 in words is "fifty-five million, five hundred seventy-one thousand, five hundred sixty".