25220515069 has 2 divisors, whose sum is σ = 25220515070. Its totient is φ = 25220515068.

The previous prime is 25220515049. The next prime is 25220515079. The reversal of 25220515069 is 96051502252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23591424025 + 1629091044 = 153595^2 + 40362^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220515069 - 2²⁵ = 25186960637 is a prime.

It is a super-2 number, since 2×25220515069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25220515009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610257534 + 12610257535.

It is an arithmetic number, because the mean of its divisors is an integer number (12610257535).

Almost surely, 2^25220515069 is an apocalyptic number.

It is an amenable number.

25220515069 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220515069 is an equidigital number, since it uses as much as digits as its factorization.

25220515069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 25220515069 in words is "twenty-five billion, two hundred twenty million, five hundred fifteen thousand, sixty-nine".