55351560 has 128 divisors (see below), whose sum is σ = 190771200. Its totient is φ = 12706560.

The previous prime is 55351537. The next prime is 55351567. The reversal of 55351560 is 6515355.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55351567) 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, 23977 + ... + 26183.

It is an arithmetic number, because the mean of its divisors is an integer number (1490400).

Almost surely, 2^55351560 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 55351560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95385600).

55351560 is an abundant number, since it is smaller than the sum of its proper divisors (135419640).

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

55351560 is a wasteful number, since it uses less digits than its factorization.

55351560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 55351560 is about 7439.8629019626. The cubic root of 55351560 is about 381.1038081435.

The spelling of 55351560 in words is "fifty-five million, three hundred fifty-one thousand, five hundred sixty".