25222019497 has 2 divisors, whose sum is σ = 25222019498. Its totient is φ = 25222019496.

The previous prime is 25222019491. The next prime is 25222019521. The reversal of 25222019497 is 79491022252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21078393856 + 4143625641 = 145184^2 + 64371^2 .

It is a cyclic number.

It is not a de Polignac number, because 25222019497 - 2¹¹ = 25222017449 is a prime.

It is not a weakly prime, because it can be changed into another prime (25222019491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611009748 + 12611009749.

It is an arithmetic number, because the mean of its divisors is an integer number (12611009749).

Almost surely, 2^25222019497 is an apocalyptic number.

It is an amenable number.

25222019497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25222019497 is an equidigital number, since it uses as much as digits as its factorization.

25222019497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 25222019497 in words is "twenty-five billion, two hundred twenty-two million, nineteen thousand, four hundred ninety-seven".