56387251 has 2 divisors, whose sum is σ = 56387252. Its totient is φ = 56387250.

The previous prime is 56387239. The next prime is 56387257. The reversal of 56387251 is 15278365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56387251 - 2¹⁵ = 56354483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56387251.

It is not a weakly prime, because it can be changed into another prime (56387257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28193625 + 28193626.

It is an arithmetic number, because the mean of its divisors is an integer number (28193626).

Almost surely, 2^56387251 is an apocalyptic number.

56387251 is a deficient number, since it is larger than the sum of its proper divisors (1).

56387251 is an equidigital number, since it uses as much as digits as its factorization.

56387251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 56387251 is about 7509.1444918845. The cubic root of 56387251 is about 383.4660978481.

The spelling of 56387251 in words is "fifty-six million, three hundred eighty-seven thousand, two hundred fifty-one".