2564515323 has 12 divisors (see below), whose sum is σ = 3841496568. Its totient is φ = 1709676720.

The previous prime is 2564515319. The next prime is 2564515337. The reversal of 2564515323 is 3235154652.

2564515323 is a `hidden beast` number, since 2 + 5 + 645 + 1 + 5 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 2564515323 - 2² = 2564515319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2564515223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5276538 + ... + 5277023.

It is an arithmetic number, because the mean of its divisors is an integer number (320124714).

Almost surely, 2^2564515323 is an apocalyptic number.

2564515323 is a deficient number, since it is larger than the sum of its proper divisors (1276981245).

2564515323 is an equidigital number, since it uses as much as digits as its factorization.

2564515323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553576 (or 10553564 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 2564515323 is about 50641.0438577247. The cubic root of 2564515323 is about 1368.7845655373.

Adding to 2564515323 its reverse (3235154652), we get a palindrome (5799669975).

The spelling of 2564515323 in words is "two billion, five hundred sixty-four million, five hundred fifteen thousand, three hundred twenty-three".