56442487 has 2 divisors, whose sum is σ = 56442488. Its totient is φ = 56442486.

The previous prime is 56442469. The next prime is 56442511. The reversal of 56442487 is 78424465.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56442487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56442887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28221243 + 28221244.

It is an arithmetic number, because the mean of its divisors is an integer number (28221244).

Almost surely, 2^56442487 is an apocalyptic number.

56442487 is a deficient number, since it is larger than the sum of its proper divisors (1).

56442487 is an equidigital number, since it uses as much as digits as its factorization.

56442487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 40.

The square root of 56442487 is about 7512.8215072634. The cubic root of 56442487 is about 383.5912692922.

The spelling of 56442487 in words is "fifty-six million, four hundred forty-two thousand, four hundred eighty-seven".