56651320 has 64 divisors (see below), whose sum is σ = 139968000. Its totient is φ = 20465280.

The previous prime is 56651317. The next prime is 56651321. The reversal of 56651320 is 2315665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56651321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87237 + ... + 87883.

It is an arithmetic number, because the mean of its divisors is an integer number (2187000).

Almost surely, 2^56651320 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 56651320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69984000).

56651320 is an abundant number, since it is smaller than the sum of its proper divisors (83316680).

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

56651320 is a wasteful number, since it uses less digits than its factorization.

56651320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 56651320 is about 7526.7071153327. The cubic root of 56651320 is about 384.0637734070.

Adding to 56651320 its reverse (2315665), we get a palindrome (58966985).

The spelling of 56651320 in words is "fifty-six million, six hundred fifty-one thousand, three hundred twenty".