2564233321 has 4 divisors (see below), whose sum is σ = 2761482052. Its totient is φ = 2366984592.

The previous prime is 2564233303. The next prime is 2564233327. The reversal of 2564233321 is 1233324652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 926898025 + 1637335296 = 30445^2 + 40464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564233321 - 2¹⁹ = 2563709033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564233327) 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, 98624346 + ... + 98624371.

It is an arithmetic number, because the mean of its divisors is an integer number (690370513).

Almost surely, 2^2564233321 is an apocalyptic number.

It is an amenable number.

2564233321 is a deficient number, since it is larger than the sum of its proper divisors (197248731).

2564233321 is a wasteful number, since it uses less digits than its factorization.

2564233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197248730.

The product of its digits is 25920, while the sum is 31.

The square root of 2564233321 is about 50638.2594586346. The cubic root of 2564233321 is about 1368.7343917766.

Adding to 2564233321 its reverse (1233324652), we get a palindrome (3797557973).

The spelling of 2564233321 in words is "two billion, five hundred sixty-four million, two hundred thirty-three thousand, three hundred twenty-one".