25312421431 has 4 divisors (see below), whose sum is σ = 27613550664. Its totient is φ = 23011292200.

The previous prime is 25312421383. The next prime is 25312421441. The reversal of 25312421431 is 13412421352.

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

It is a cyclic number.

It is not a de Polignac number, because 25312421431 - 2⁹ = 25312420919 is a prime.

It is a super-2 number, since 2×25312421431² (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 25312421431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312421441) 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, 1150564600 + ... + 1150564621.

It is an arithmetic number, because the mean of its divisors is an integer number (6903387666).

Almost surely, 2^25312421431 is an apocalyptic number.

25312421431 is a deficient number, since it is larger than the sum of its proper divisors (2301129233).

25312421431 is a wasteful number, since it uses less digits than its factorization.

25312421431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301129232.

The product of its digits is 5760, while the sum is 28.

Adding to 25312421431 its reverse (13412421352), we get a palindrome (38724842783).

The spelling of 25312421431 in words is "twenty-five billion, three hundred twelve million, four hundred twenty-one thousand, four hundred thirty-one".