56649851 has 4 divisors (see below), whose sum is σ = 59112912. Its totient is φ = 54186792.

The previous prime is 56649829. The next prime is 56649863. The reversal of 56649851 is 15894665.

56649851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15894665 = 5 ⋅3178933.

It is a cyclic number.

It is not a de Polignac number, because 56649851 - 2⁶ = 56649787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56649871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231496 + ... + 1231541.

It is an arithmetic number, because the mean of its divisors is an integer number (14778228).

Almost surely, 2^56649851 is an apocalyptic number.

56649851 is a deficient number, since it is larger than the sum of its proper divisors (2463061).

56649851 is a wasteful number, since it uses less digits than its factorization.

56649851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463060.

The product of its digits is 259200, while the sum is 44.

The square root of 56649851 is about 7526.6095288649. The cubic root of 56649851 is about 384.0604537164.

The spelling of 56649851 in words is "fifty-six million, six hundred forty-nine thousand, eight hundred fifty-one".