25244052413 has 4 divisors (see below), whose sum is σ = 25493993628. Its totient is φ = 24994111200.

The previous prime is 25244052397. The next prime is 25244052433. The reversal of 25244052413 is 31425044252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24466590724 + 777461689 = 156418^2 + 27883^2 .

It is a cyclic number.

It is not a de Polignac number, because 25244052413 - 2⁴ = 25244052397 is a prime.

It is a super-2 number, since 2×25244052413² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25244052413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25244052433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124970456 + ... + 124970657.

It is an arithmetic number, because the mean of its divisors is an integer number (6373498407).

Almost surely, 2^25244052413 is an apocalyptic number.

It is an amenable number.

25244052413 is a deficient number, since it is larger than the sum of its proper divisors (249941215).

25244052413 is a wasteful number, since it uses less digits than its factorization.

25244052413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249941214.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 25244052413 its reverse (31425044252), we get a palindrome (56669096665).

The spelling of 25244052413 in words is "twenty-five billion, two hundred forty-four million, fifty-two thousand, four hundred thirteen".