56515424 has 96 divisors (see below), whose sum is σ = 137088000. Its totient is φ = 22861440.

The previous prime is 56515421. The next prime is 56515427. The reversal of 56515424 is 42451565.

It is an interprime number because it is at equal distance from previous prime (56515421) and next prime (56515427).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515421) 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, 208409 + ... + 208679.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^56515424 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 56515424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68544000).

56515424 is an abundant number, since it is smaller than the sum of its proper divisors (80572576).

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

56515424 is a wasteful number, since it uses less digits than its factorization.

56515424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 299 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 56515424 is about 7517.6741083928. The cubic root of 56515424 is about 383.7564282894.

Adding to 56515424 its reverse (42451565), we get a palindrome (98966989).

The spelling of 56515424 in words is "fifty-six million, five hundred fifteen thousand, four hundred twenty-four".