56516791 has 2 divisors, whose sum is σ = 56516792. Its totient is φ = 56516790.

The previous prime is 56516783. The next prime is 56516809. The reversal of 56516791 is 19761565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56516791 - 2³ = 56516783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56516771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28258395 + 28258396.

It is an arithmetic number, because the mean of its divisors is an integer number (28258396).

Almost surely, 2^56516791 is an apocalyptic number.

56516791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56516791 is an equidigital number, since it uses as much as digits as its factorization.

56516791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 56516791 is about 7517.7650269212. The cubic root of 56516791 is about 383.7595223758.

The spelling of 56516791 in words is "fifty-six million, five hundred sixteen thousand, seven hundred ninety-one".