55916520 has 96 divisors (see below), whose sum is σ = 184433760. Its totient is φ = 13552000.

The previous prime is 55916513. The next prime is 55916521. The reversal of 55916520 is 2561955.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55916521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12595 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (1921185).

Almost surely, 2^55916520 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 55916520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92216880).

55916520 is an abundant number, since it is smaller than the sum of its proper divisors (128517240).

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

55916520 is a wasteful number, since it uses less digits than its factorization.

55916520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 55916520 is about 7477.7349511734. The cubic root of 55916520 is about 382.3960330874.

The spelling of 55916520 in words is "fifty-five million, nine hundred sixteen thousand, five hundred twenty".