25513111133 has 2 divisors, whose sum is σ = 25513111134. Its totient is φ = 25513111132.

The previous prime is 25513111121. The next prime is 25513111147. The reversal of 25513111133 is 33111131552.

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., 22918023769 + 2595087364 = 151387^2 + 50942^2 .

It is a cyclic number.

It is not a de Polignac number, because 25513111133 - 2⁶ = 25513111069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25513111033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756555566 + 12756555567.

It is an arithmetic number, because the mean of its divisors is an integer number (12756555567).

Almost surely, 2^25513111133 is an apocalyptic number.

It is an amenable number.

25513111133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513111133 is an equidigital number, since it uses as much as digits as its factorization.

25513111133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

Adding to 25513111133 its reverse (33111131552), we get a palindrome (58624242685).

The spelling of 25513111133 in words is "twenty-five billion, five hundred thirteen million, one hundred eleven thousand, one hundred thirty-three".