2056167021 has 4 divisors (see below), whose sum is σ = 2741556032. Its totient is φ = 1370778012.

The previous prime is 2056167011. The next prime is 2056167073. The reversal of 2056167021 is 1207616502.

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 not a de Polignac number, because 2056167021 - 2⁹ = 2056166509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2056167021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056167011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342694501 + ... + 342694506.

It is an arithmetic number, because the mean of its divisors is an integer number (685389008).

Almost surely, 2^2056167021 is an apocalyptic number.

It is an amenable number.

2056167021 is a deficient number, since it is larger than the sum of its proper divisors (685389011).

2056167021 is an equidigital number, since it uses as much as digits as its factorization.

2056167021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685389010.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2056167021 is about 45344.9779027402. The cubic root of 2056167021 is about 1271.6066674507.

The spelling of 2056167021 in words is "two billion, fifty-six million, one hundred sixty-seven thousand, twenty-one".