56219987 has 2 divisors, whose sum is σ = 56219988. Its totient is φ = 56219986.

The previous prime is 56219971. The next prime is 56220007. The reversal of 56219987 is 78991265.

56219987 is nontrivially palindromic in base 16.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56219987 - 2⁴ = 56219971 is a prime.

It is not a weakly prime, because it can be changed into another prime (56219927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28109993 + 28109994.

It is an arithmetic number, because the mean of its divisors is an integer number (28109994).

Almost surely, 2^56219987 is an apocalyptic number.

56219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56219987 is an equidigital number, since it uses as much as digits as its factorization.

56219987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 56219987 is about 7497.9988663643. The cubic root of 56219987 is about 383.0865581620.

The spelling of 56219987 in words is "fifty-six million, two hundred nineteen thousand, nine hundred eighty-seven".