56120521 has 4 divisors (see below), whose sum is σ = 56303632. Its totient is φ = 55937412.

The previous prime is 56120507. The next prime is 56120551. The reversal of 56120521 is 12502165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56120521 - 2⁵ = 56120489 is a prime.

It is a super-2 number, since 2×56120521² = 6299025754622882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56120492 and 56120501.

It is not an unprimeable number, because it can be changed into a prime (56120501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91095 + ... + 91708.

It is an arithmetic number, because the mean of its divisors is an integer number (14075908).

Almost surely, 2^56120521 is an apocalyptic number.

It is an amenable number.

56120521 is a deficient number, since it is larger than the sum of its proper divisors (183111).

56120521 is a wasteful number, since it uses less digits than its factorization.

56120521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183110.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 56120521 is about 7491.3630935898. The cubic root of 56120521 is about 382.8605022499.

Adding to 56120521 its reverse (12502165), we get a palindrome (68622686).

The spelling of 56120521 in words is "fifty-six million, one hundred twenty thousand, five hundred twenty-one".