2056560221 has 4 divisors (see below), whose sum is σ = 2067327744. Its totient is φ = 2045792700.

The previous prime is 2056560131. The next prime is 2056560257. The reversal of 2056560221 is 1220656502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2056560221 - 2¹⁴ = 2056543837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056560271) 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, 5383475 + ... + 5383856.

It is an arithmetic number, because the mean of its divisors is an integer number (516831936).

Almost surely, 2^2056560221 is an apocalyptic number.

It is an amenable number.

2056560221 is a deficient number, since it is larger than the sum of its proper divisors (10767523).

2056560221 is a wasteful number, since it uses less digits than its factorization.

2056560221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767522.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2056560221 is about 45349.3133465106. The cubic root of 2056560221 is about 1271.6877185632.

The spelling of 2056560221 in words is "two billion, fifty-six million, five hundred sixty thousand, two hundred twenty-one".