55208560 has 80 divisors (see below), whose sum is σ = 143383680. Its totient is φ = 19595520.

The previous prime is 55208539. The next prime is 55208567. The reversal of 55208560 is 6580255.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55208567) 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, 37111 + ... + 38569.

It is an arithmetic number, because the mean of its divisors is an integer number (1792296).

Almost surely, 2^55208560 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 55208560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71691840).

55208560 is an abundant number, since it is smaller than the sum of its proper divisors (88175120).

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

55208560 is a wasteful number, since it uses less digits than its factorization.

55208560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 55208560 is about 7430.2462947065. The cubic root of 55208560 is about 380.7753329478.

The spelling of 55208560 in words is "fifty-five million, two hundred eight thousand, five hundred sixty".