25222973813 has 2 divisors, whose sum is σ = 25222973814. Its totient is φ = 25222973812.

The previous prime is 25222973707. The next prime is 25222973821. The reversal of 25222973813 is 31837922252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14524588324 + 10698385489 = 120518^2 + 103433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25222973813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25222973843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611486906 + 12611486907.

It is an arithmetic number, because the mean of its divisors is an integer number (12611486907).

Almost surely, 2^25222973813 is an apocalyptic number.

It is an amenable number.

25222973813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25222973813 is an equidigital number, since it uses as much as digits as its factorization.

25222973813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The spelling of 25222973813 in words is "twenty-five billion, two hundred twenty-two million, nine hundred seventy-three thousand, eight hundred thirteen".