56199191 has 2 divisors, whose sum is σ = 56199192. Its totient is φ = 56199190.

The previous prime is 56199179. The next prime is 56199193. The reversal of 56199191 is 19199165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56199191 - 2¹⁸ = 55937047 is a prime.

It is a Sophie Germain prime.

Together with 56199193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56199193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28099595 + 28099596.

It is an arithmetic number, because the mean of its divisors is an integer number (28099596).

Almost surely, 2^56199191 is an apocalyptic number.

56199191 is a deficient number, since it is larger than the sum of its proper divisors (1).

56199191 is an equidigital number, since it uses as much as digits as its factorization.

56199191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 41.

The square root of 56199191 is about 7496.6119680826. The cubic root of 56199191 is about 383.0393172489.

The spelling of 56199191 in words is "fifty-six million, one hundred ninety-nine thousand, one hundred ninety-one".