56321387 has 2 divisors, whose sum is σ = 56321388. Its totient is φ = 56321386.

The previous prime is 56321329. The next prime is 56321429. The reversal of 56321387 is 78312365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56321387 - 2⁸ = 56321131 is a prime.

It is not a weakly prime, because it can be changed into another prime (56320387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28160693 + 28160694.

It is an arithmetic number, because the mean of its divisors is an integer number (28160694).

Almost surely, 2^56321387 is an apocalyptic number.

56321387 is a deficient number, since it is larger than the sum of its proper divisors (1).

56321387 is an equidigital number, since it uses as much as digits as its factorization.

56321387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 56321387 is about 7504.7576243340. The cubic root of 56321387 is about 383.3167351771.

The spelling of 56321387 in words is "fifty-six million, three hundred twenty-one thousand, three hundred eighty-seven".