55650320 has 60 divisors (see below), whose sum is σ = 142243500. Its totient is φ = 20232960.

The previous prime is 55650313. The next prime is 55650337. The reversal of 55650320 is 2305655.

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 47720464 = 2816^2 + 6908^2 .

It is a super-2 number, since 2×55650320² = 6193916232204800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55650320.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6806 + ... + 12554.

It is an arithmetic number, because the mean of its divisors is an integer number (2370725).

Almost surely, 2^55650320 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 55650320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71121750).

55650320 is an abundant number, since it is smaller than the sum of its proper divisors (86593180).

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

55650320 is a wasteful number, since it uses less digits than its factorization.

55650320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5784 (or 5767 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 55650320 is about 7459.9142086220. The cubic root of 55650320 is about 381.7882473612.

Adding to 55650320 its reverse (2305655), we get a palindrome (57955975).

The spelling of 55650320 in words is "fifty-five million, six hundred fifty thousand, three hundred twenty".