56135511 has 40 divisors (see below), whose sum is σ = 87398784. Its totient is φ = 35879760.

The previous prime is 56135501. The next prime is 56135537. The reversal of 56135511 is 11553165.

It is not a de Polignac number, because 56135511 - 2¹⁵ = 56102743 is a prime.

It is a super-2 number, since 2×56135511² = 6302391190462242, which contains 22 as substring.

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 (56135501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 247180 + ... + 247406.

Almost surely, 2^56135511 is an apocalyptic number.

56135511 is a deficient number, since it is larger than the sum of its proper divisors (31263273).

56135511 is a wasteful number, since it uses less digits than its factorization.

56135511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 344 counting only the distinct ones).

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

The square root of 56135511 is about 7492.3635122703. The cubic root of 56135511 is about 382.8945870370.

Adding to 56135511 its reverse (11553165), we get a palindrome (67688676).

The spelling of 56135511 in words is "fifty-six million, one hundred thirty-five thousand, five hundred eleven".