56188919 has 2 divisors, whose sum is σ = 56188920. Its totient is φ = 56188918.

The previous prime is 56188907. The next prime is 56188949. The reversal of 56188919 is 91988165.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56188919 is a prime.

It is a super-2 number, since 2×56188919² = 6314389236777122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56188949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28094459 + 28094460.

It is an arithmetic number, because the mean of its divisors is an integer number (28094460).

Almost surely, 2^56188919 is an apocalyptic number.

56188919 is a deficient number, since it is larger than the sum of its proper divisors (1).

56188919 is an equidigital number, since it uses as much as digits as its factorization.

56188919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 47.

The square root of 56188919 is about 7495.9268272843. The cubic root of 56188919 is about 383.0159787183.

The spelling of 56188919 in words is "fifty-six million, one hundred eighty-eight thousand, nine hundred nineteen".