56311261 has 4 divisors (see below), whose sum is σ = 56360124. Its totient is φ = 56262400.

The previous prime is 56311249. The next prime is 56311271. The reversal of 56311261 is 16211365.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32604100 + 23707161 = 5710^2 + 4869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56311261 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 (56311201) 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, 22660 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (14090031).

Almost surely, 2^56311261 is an apocalyptic number.

It is an amenable number.

56311261 is a deficient number, since it is larger than the sum of its proper divisors (48863).

56311261 is a wasteful number, since it uses less digits than its factorization.

56311261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48862.

The product of its digits is 1080, while the sum is 25.

The square root of 56311261 is about 7504.0829552984. The cubic root of 56311261 is about 383.2937616786.

The spelling of 56311261 in words is "fifty-six million, three hundred eleven thousand, two hundred sixty-one".