25415571241 has 2 divisors, whose sum is σ = 25415571242. Its totient is φ = 25415571240.

The previous prime is 25415571211. The next prime is 25415571281. The reversal of 25415571241 is 14217551452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25190451225 + 225120016 = 158715^2 + 15004^2 .

It is a cyclic number.

It is not a de Polignac number, because 25415571241 - 2²¹ = 25413474089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25415571241.

It is not a weakly prime, because it can be changed into another prime (25415571211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12707785620 + 12707785621.

It is an arithmetic number, because the mean of its divisors is an integer number (12707785621).

Almost surely, 2^25415571241 is an apocalyptic number.

It is an amenable number.

25415571241 is a deficient number, since it is larger than the sum of its proper divisors (1).

25415571241 is an equidigital number, since it uses as much as digits as its factorization.

25415571241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56000, while the sum is 37.

The spelling of 25415571241 in words is "twenty-five billion, four hundred fifteen million, five hundred seventy-one thousand, two hundred forty-one".