56031587 has 2 divisors, whose sum is σ = 56031588. Its totient is φ = 56031586.

The previous prime is 56031583. The next prime is 56031593. The reversal of 56031587 is 78513065.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56031587 - 2² = 56031583 is a prime.

It is not a weakly prime, because it can be changed into another prime (56031581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28015793 + 28015794.

It is an arithmetic number, because the mean of its divisors is an integer number (28015794).

Almost surely, 2^56031587 is an apocalyptic number.

56031587 is a deficient number, since it is larger than the sum of its proper divisors (1).

56031587 is an equidigital number, since it uses as much as digits as its factorization.

56031587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 56031587 is about 7485.4249712358. The cubic root of 56031587 is about 382.6581560784.

The spelling of 56031587 in words is "fifty-six million, thirty-one thousand, five hundred eighty-seven".