55513770 has 64 divisors (see below), whose sum is σ = 144668160. Its totient is φ = 13552128.

The previous prime is 55513753. The next prime is 55513771. The reversal of 55513770 is 7731555.

55513770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55513770² = 6163557319225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55513771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52911 + ... + 53949.

It is an arithmetic number, because the mean of its divisors is an integer number (2260440).

Almost surely, 2^55513770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55513770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72334080).

55513770 is an abundant number, since it is smaller than the sum of its proper divisors (89154390).

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

55513770 is a wasteful number, since it uses less digits than its factorization.

55513770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 55513770 is about 7450.7563374466. The cubic root of 55513770 is about 381.4757251488.

The spelling of 55513770 in words is "fifty-five million, five hundred thirteen thousand, seven hundred seventy".