56181311 has 12 divisors (see below), whose sum is σ = 60520752. Its totient is φ = 52132608.

The previous prime is 56181299. The next prime is 56181319. The reversal of 56181311 is 11318165.

It is not a de Polignac number, because 56181311 - 2¹⁸ = 55919167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56181319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19766 + ... + 22428.

It is an arithmetic number, because the mean of its divisors is an integer number (5043396).

Almost surely, 2^56181311 is an apocalyptic number.

56181311 is a deficient number, since it is larger than the sum of its proper divisors (4339441).

56181311 is a wasteful number, since it uses less digits than its factorization.

56181311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2753 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 56181311 is about 7495.4193345002. The cubic root of 56181311 is about 382.9986911039.

Adding to 56181311 its reverse (11318165), we get a palindrome (67499476).

The spelling of 56181311 in words is "fifty-six million, one hundred eighty-one thousand, three hundred eleven".