56281879 has 4 divisors (see below), whose sum is σ = 56430760. Its totient is φ = 56133000.

The previous prime is 56281877. The next prime is 56281903. The reversal of 56281879 is 97818265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97818265 = 5 ⋅19563653.

It is a cyclic number.

It is not a de Polignac number, because 56281879 - 2¹ = 56281877 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 (56281873) 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, 73872 + ... + 74629.

It is an arithmetic number, because the mean of its divisors is an integer number (14107690).

Almost surely, 2^56281879 is an apocalyptic number.

56281879 is a deficient number, since it is larger than the sum of its proper divisors (148881).

56281879 is a wasteful number, since it uses less digits than its factorization.

56281879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148880.

The product of its digits is 241920, while the sum is 46.

The square root of 56281879 is about 7502.1249656347. The cubic root of 56281879 is about 383.2270852779.

The spelling of 56281879 in words is "fifty-six million, two hundred eighty-one thousand, eight hundred seventy-nine".