56403187 has 4 divisors (see below), whose sum is σ = 56461896. Its totient is φ = 56344480.

The previous prime is 56403169. The next prime is 56403239. The reversal of 56403187 is 78130465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56403187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56403157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27889 + ... + 29842.

It is an arithmetic number, because the mean of its divisors is an integer number (14115474).

Almost surely, 2^56403187 is an apocalyptic number.

56403187 is a deficient number, since it is larger than the sum of its proper divisors (58709).

56403187 is an equidigital number, since it uses as much as digits as its factorization.

56403187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58708.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 56403187 is about 7510.2055231531. The cubic root of 56403187 is about 383.5022191346.

The spelling of 56403187 in words is "fifty-six million, four hundred three thousand, one hundred eighty-seven".