56501911 has 2 divisors, whose sum is σ = 56501912. Its totient is φ = 56501910.

The previous prime is 56501909. The next prime is 56501941. The reversal of 56501911 is 11910565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56501911 - 2¹ = 56501909 is a prime.

Together with 56501909, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 56501911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56501941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28250955 + 28250956.

It is an arithmetic number, because the mean of its divisors is an integer number (28250956).

Almost surely, 2^56501911 is an apocalyptic number.

56501911 is a deficient number, since it is larger than the sum of its proper divisors (1).

56501911 is an equidigital number, since it uses as much as digits as its factorization.

56501911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 56501911 is about 7516.7753059407. The cubic root of 56501911 is about 383.7258400971.

The spelling of 56501911 in words is "fifty-six million, five hundred one thousand, nine hundred eleven".