56137771 has 2 divisors, whose sum is σ = 56137772. Its totient is φ = 56137770.

The previous prime is 56137727. The next prime is 56137777. The reversal of 56137771 is 17773165.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56137771 - 2⁹ = 56137259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56137771.

It is not a weakly prime, because it can be changed into another prime (56137777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28068885 + 28068886.

It is an arithmetic number, because the mean of its divisors is an integer number (28068886).

Almost surely, 2^56137771 is an apocalyptic number.

56137771 is a deficient number, since it is larger than the sum of its proper divisors (1).

56137771 is an equidigital number, since it uses as much as digits as its factorization.

56137771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 37.

The square root of 56137771 is about 7492.5143309840. The cubic root of 56137771 is about 382.8997253778.

The spelling of 56137771 in words is "fifty-six million, one hundred thirty-seven thousand, seven hundred seventy-one".