56120511 has 4 divisors (see below), whose sum is σ = 74827352. Its totient is φ = 37413672.

The previous prime is 56120507. The next prime is 56120551. The reversal of 56120511 is 11502165.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56120511 - 2² = 56120507 is a prime.

It is a super-2 number, since 2×56120511² = 6299023509802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 9353416 + ... + 9353421.

It is an arithmetic number, because the mean of its divisors is an integer number (18706838).

Almost surely, 2^56120511 is an apocalyptic number.

56120511 is a deficient number, since it is larger than the sum of its proper divisors (18706841).

56120511 is a wasteful number, since it uses less digits than its factorization.

56120511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18706840.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 56120511 is about 7491.3624261545. The cubic root of 56120511 is about 382.8604795095.

Adding to 56120511 its reverse (11502165), we get a palindrome (67622676).

The spelling of 56120511 in words is "fifty-six million, one hundred twenty thousand, five hundred eleven".