56513511 has 16 divisors (see below), whose sum is σ = 85098720. Its totient is φ = 37056960.

The previous prime is 56513497. The next prime is 56513533. The reversal of 56513511 is 11531565.

56513511 is a `hidden beast` number, since 5 + 651 + 3 + 5 + 1 + 1 = 666.

It is not a de Polignac number, because 56513511 - 2⁷ = 56513383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56513551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15510 + ... + 18803.

It is an arithmetic number, because the mean of its divisors is an integer number (5318670).

Almost surely, 2^56513511 is an apocalyptic number.

56513511 is a deficient number, since it is larger than the sum of its proper divisors (28585209).

56513511 is a wasteful number, since it uses less digits than its factorization.

56513511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34383 (or 34377 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 56513511 is about 7517.5468738146. The cubic root of 56513511 is about 383.7520982955.

The spelling of 56513511 in words is "fifty-six million, five hundred thirteen thousand, five hundred eleven".