55513008 has 60 divisors (see below), whose sum is σ = 156106080. Its totient is φ = 18415488.

The previous prime is 55513001. The next prime is 55513009. The reversal of 55513008 is 80031555.

It is not an unprimeable number, because it can be changed into a prime (55513001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33610 + ... + 35222.

It is an arithmetic number, because the mean of its divisors is an integer number (2601768).

Almost surely, 2^55513008 is an apocalyptic number.

55513008 is the 4302-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55513008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78053040).

55513008 is an abundant number, since it is smaller than the sum of its proper divisors (100593072).

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

55513008 is a wasteful number, since it uses less digits than its factorization.

55513008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 55513008 is about 7450.7052015229. The cubic root of 55513008 is about 381.4739797210.

The spelling of 55513008 in words is "fifty-five million, five hundred thirteen thousand, eight".