25234243253 has 4 divisors (see below), whose sum is σ = 26331384288. Its totient is φ = 24137102220.

The previous prime is 25234243219. The next prime is 25234243261. The reversal of 25234243253 is 35234243252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25234243253 - 2⁸ = 25234242997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25234443253) 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, 548570483 + ... + 548570528.

It is an arithmetic number, because the mean of its divisors is an integer number (6582846072).

Almost surely, 2^25234243253 is an apocalyptic number.

25234243253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25234243253 is a deficient number, since it is larger than the sum of its proper divisors (1097141035).

25234243253 is a wasteful number, since it uses less digits than its factorization.

25234243253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097141034.

The product of its digits is 172800, while the sum is 35.

Subtracting 25234243253 from its reverse (35234243252), we obtain a palindrome (9999999999).

The spelling of 25234243253 in words is "twenty-five billion, two hundred thirty-four million, two hundred forty-three thousand, two hundred fifty-three".