25087222817 has 2 divisors, whose sum is σ = 25087222818. Its totient is φ = 25087222816.

The previous prime is 25087222733. The next prime is 25087222819. The reversal of 25087222817 is 71822278052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15062407441 + 10024815376 = 122729^2 + 100124^2 .

It is a cyclic number.

It is not a de Polignac number, because 25087222817 - 2¹² = 25087218721 is a prime.

Together with 25087222819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25087222819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12543611408 + 12543611409.

It is an arithmetic number, because the mean of its divisors is an integer number (12543611409).

Almost surely, 2^25087222817 is an apocalyptic number.

It is an amenable number.

25087222817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25087222817 is an equidigital number, since it uses as much as digits as its factorization.

25087222817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 44.

The spelling of 25087222817 in words is "twenty-five billion, eighty-seven million, two hundred twenty-two thousand, eight hundred seventeen".