55520316 has 60 divisors (see below), whose sum is σ = 145853400. Its totient is φ = 18416160.

The previous prime is 55520293. The next prime is 55520323. The reversal of 55520316 is 61302555.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 55520316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112831 + ... + 113321.

It is an arithmetic number, because the mean of its divisors is an integer number (2430890).

Almost surely, 2^55520316 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 55520316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72926700).

55520316 is an abundant number, since it is smaller than the sum of its proper divisors (90333084).

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

55520316 is a wasteful number, since it uses less digits than its factorization.

55520316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55520316 is about 7451.1956087597. The cubic root of 55520316 is about 381.4907186777.

The spelling of 55520316 in words is "fifty-five million, five hundred twenty thousand, three hundred sixteen".