2564321251 has 2 divisors, whose sum is σ = 2564321252. Its totient is φ = 2564321250.

The previous prime is 2564321203. The next prime is 2564321299. The reversal of 2564321251 is 1521234652.

It is a balanced prime because it is at equal distance from previous prime (2564321203) and next prime (2564321299).

It is a cyclic number.

It is not a de Polignac number, because 2564321251 - 2¹¹ = 2564319203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2564321051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282160625 + 1282160626.

It is an arithmetic number, because the mean of its divisors is an integer number (1282160626).

Almost surely, 2^2564321251 is an apocalyptic number.

2564321251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564321251 is an equidigital number, since it uses as much as digits as its factorization.

2564321251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The square root of 2564321251 is about 50639.1276682369. The cubic root of 2564321251 is about 1368.7500366659.

The spelling of 2564321251 in words is "two billion, five hundred sixty-four million, three hundred twenty-one thousand, two hundred fifty-one".