56439851 has 4 divisors (see below), whose sum is σ = 60781392. Its totient is φ = 52098312.

The previous prime is 56439841. The next prime is 56439863. The reversal of 56439851 is 15893465.

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

It is a cyclic number.

It is not a de Polignac number, because 56439851 - 2⁶ = 56439787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56439799 and 56439808.

It is not an unprimeable number, because it can be changed into a prime (56439811) 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, 2170751 + ... + 2170776.

It is an arithmetic number, because the mean of its divisors is an integer number (15195348).

Almost surely, 2^56439851 is an apocalyptic number.

56439851 is a deficient number, since it is larger than the sum of its proper divisors (4341541).

56439851 is a wasteful number, since it uses less digits than its factorization.

56439851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341540.

The product of its digits is 129600, while the sum is 41.

The square root of 56439851 is about 7512.6460717912. The cubic root of 56439851 is about 383.5852976540.

The spelling of 56439851 in words is "fifty-six million, four hundred thirty-nine thousand, eight hundred fifty-one".