2056321213 has 4 divisors (see below), whose sum is σ = 2111897500. Its totient is φ = 2000744928.

The previous prime is 2056321199. The next prime is 2056321231. The reversal of 2056321213 is 3121236502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121236502 = 2 ⋅1560618251.

It can be written as a sum of positive squares in 2 ways, for example, as 951290649 + 1105030564 = 30843^2 + 33242^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056321213 - 2⁵ = 2056321181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056321243) 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, 27788088 + ... + 27788161.

It is an arithmetic number, because the mean of its divisors is an integer number (527974375).

Almost surely, 2^2056321213 is an apocalyptic number.

It is an amenable number.

2056321213 is a deficient number, since it is larger than the sum of its proper divisors (55576287).

2056321213 is an equidigital number, since it uses as much as digits as its factorization.

2056321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55576286.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2056321213 is about 45346.6780812002. The cubic root of 2056321213 is about 1271.6384525914.

Adding to 2056321213 its reverse (3121236502), we get a palindrome (5177557715).

The spelling of 2056321213 in words is "two billion, fifty-six million, three hundred twenty-one thousand, two hundred thirteen".