56287447 has 4 divisors (see below), whose sum is σ = 56785680. Its totient is φ = 55789216.

The previous prime is 56287433. The next prime is 56287477. The reversal of 56287447 is 74478265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74478265 = 5 ⋅14895653.

It is a cyclic number.

It is not a de Polignac number, because 56287447 - 2¹⁹ = 55763159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56287477) 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, 248947 + ... + 249172.

It is an arithmetic number, because the mean of its divisors is an integer number (14196420).

Almost surely, 2^56287447 is an apocalyptic number.

56287447 is a deficient number, since it is larger than the sum of its proper divisors (498233).

56287447 is a wasteful number, since it uses less digits than its factorization.

56287447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498232.

The product of its digits is 376320, while the sum is 43.

The square root of 56287447 is about 7502.4960513152. The cubic root of 56287447 is about 383.2397224895.

The spelling of 56287447 in words is "fifty-six million, two hundred eighty-seven thousand, four hundred forty-seven".