56381947 has 4 divisors (see below), whose sum is σ = 58833360. Its totient is φ = 53930536.

The previous prime is 56381933. The next prime is 56381951. The reversal of 56381947 is 74918365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74918365 = 5 ⋅14983673.

It is a cyclic number.

It is not a de Polignac number, because 56381947 - 2¹⁵ = 56349179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56381977) 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, 1225672 + ... + 1225717.

It is an arithmetic number, because the mean of its divisors is an integer number (14708340).

Almost surely, 2^56381947 is an apocalyptic number.

56381947 is a deficient number, since it is larger than the sum of its proper divisors (2451413).

56381947 is a wasteful number, since it uses less digits than its factorization.

56381947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451412.

The product of its digits is 181440, while the sum is 43.

The square root of 56381947 is about 7508.7913141863. The cubic root of 56381947 is about 383.4540740429.

The spelling of 56381947 in words is "fifty-six million, three hundred eighty-one thousand, nine hundred forty-seven".