56043520 has 96 divisors (see below), whose sum is σ = 145159560. Its totient is φ = 20643840.

The previous prime is 56043517. The next prime is 56043539. The reversal of 56043520 is 2534065.

It can be written as a sum of positive squares in 4 ways, for example, as 15492096 + 40551424 = 3936^2 + 6368^2 .

It is a super-2 number, since 2×56043520² = 6281752267980800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132910 + ... + 133330.

Almost surely, 2^56043520 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 56043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72579780).

56043520 is an abundant number, since it is smaller than the sum of its proper divisors (89116040).

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

56043520 is a wasteful number, since it uses less digits than its factorization.

56043520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 56043520 is about 7486.2220111349. Note that the first 3 decimals coincide. The cubic root of 56043520 is about 382.6853189455.

Adding to 56043520 its reverse (2534065), we get a palindrome (58577585).

The spelling of 56043520 in words is "fifty-six million, forty-three thousand, five hundred twenty".