25424245313 has 16 divisors (see below), whose sum is σ = 25837703760. Its totient is φ = 25014583296.

The previous prime is 25424245307. The next prime is 25424245349. The reversal of 25424245313 is 31354242452.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3225331264 + 22198914049 = 56792^2 + 148993^2 .

It is a cyclic number.

It is not a de Polignac number, because 25424245313 - 2¹⁰ = 25424244289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25424245303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20552531 + ... + 20553767.

It is an arithmetic number, because the mean of its divisors is an integer number (1614856485).

Almost surely, 2^25424245313 is an apocalyptic number.

It is an amenable number.

25424245313 is a deficient number, since it is larger than the sum of its proper divisors (413458447).

25424245313 is a wasteful number, since it uses less digits than its factorization.

25424245313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516.

The product of its digits is 115200, while the sum is 35.

Adding to 25424245313 its reverse (31354242452), we get a palindrome (56778487765).

The spelling of 25424245313 in words is "twenty-five billion, four hundred twenty-four million, two hundred forty-five thousand, three hundred thirteen".