56287311 has 4 divisors (see below), whose sum is σ = 75049752. Its totient is φ = 37524872.

The previous prime is 56287271. The next prime is 56287321. The reversal of 56287311 is 11378265.

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

It is a cyclic number.

It is not a de Polignac number, because 56287311 - 2¹⁴ = 56270927 is a prime.

It is a super-2 number, since 2×56287311² = 6336522759221442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56287321) 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, 9381216 + ... + 9381221.

It is an arithmetic number, because the mean of its divisors is an integer number (18762438).

Almost surely, 2^56287311 is an apocalyptic number.

56287311 is a deficient number, since it is larger than the sum of its proper divisors (18762441).

56287311 is a wasteful number, since it uses less digits than its factorization.

56287311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18762440.

The product of its digits is 10080, while the sum is 33.

The square root of 56287311 is about 7502.4869876595. The cubic root of 56287311 is about 383.2394138319.

The spelling of 56287311 in words is "fifty-six million, two hundred eighty-seven thousand, three hundred eleven".