2564515244 has 24 divisors (see below), whose sum is σ = 4527397728. Its totient is φ = 1271013120.

The previous prime is 2564515241. The next prime is 2564515259. The reversal of 2564515244 is 4425154652.

It is a junction number, because it is equal to n+sod(n) for n = 2564515198 and 2564515207.

It is not an unprimeable number, because it can be changed into a prime (2564515241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267209 + ... + 276639.

It is an arithmetic number, because the mean of its divisors is an integer number (188641572).

Almost surely, 2^2564515244 is an apocalyptic number.

It is an amenable number.

2564515244 is a deficient number, since it is larger than the sum of its proper divisors (1962882484).

2564515244 is a wasteful number, since it uses less digits than its factorization.

2564515244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10025 (or 10023 counting only the distinct ones).

The product of its digits is 192000, while the sum is 38.

The square root of 2564515244 is about 50641.0430777250. The cubic root of 2564515244 is about 1368.7845514821.

Adding to 2564515244 its reverse (4425154652), we get a palindrome (6989669896).

The spelling of 2564515244 in words is "two billion, five hundred sixty-four million, five hundred fifteen thousand, two hundred forty-four".