2564520331 has 2 divisors, whose sum is σ = 2564520332. Its totient is φ = 2564520330.

The previous prime is 2564520323. The next prime is 2564520403. The reversal of 2564520331 is 1330254652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2564520331 - 2³ = 2564520323 is a prime.

It is a super-2 number, since 2×2564520331² = 13153529056224699122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2564520293 and 2564520302.

It is not a weakly prime, because it can be changed into another prime (2564520131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282260165 + 1282260166.

It is an arithmetic number, because the mean of its divisors is an integer number (1282260166).

Almost surely, 2^2564520331 is an apocalyptic number.

2564520331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564520331 is an equidigital number, since it uses as much as digits as its factorization.

2564520331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2564520331 is about 50641.0933037588. The cubic root of 2564520331 is about 1368.7854565268.

Adding to 2564520331 its reverse (1330254652), we get a palindrome (3894774983).

The spelling of 2564520331 in words is "two billion, five hundred sixty-four million, five hundred twenty thousand, three hundred thirty-one".