56899221 has 16 divisors (see below), whose sum is σ = 80512704. Its totient is φ = 35619584.

The previous prime is 56899211. The next prime is 56899223. The reversal of 56899221 is 12299865.

56899221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56899221 - 2¹¹ = 56897173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56899223) 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 15 ways as a sum of consecutive naturals, for example, 27406 + ... + 29408.

It is an arithmetic number, because the mean of its divisors is an integer number (5032044).

Almost surely, 2^56899221 is an apocalyptic number.

56899221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56899221 is a deficient number, since it is larger than the sum of its proper divisors (23613483).

56899221 is a wasteful number, since it uses less digits than its factorization.

56899221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580.

The product of its digits is 77760, while the sum is 42.

The square root of 56899221 is about 7543.1572302319. The cubic root of 56899221 is about 384.6231675728.

The spelling of 56899221 in words is "fifty-six million, eight hundred ninety-nine thousand, two hundred twenty-one".