25431214451 has 4 divisors (see below), whose sum is σ = 25436141472. Its totient is φ = 25426287432.

The previous prime is 25431214439. The next prime is 25431214483. The reversal of 25431214451 is 15441213452.

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 25431214451 - 2⁶ = 25431214387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25431214421) 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, 2455760 + ... + 2466093.

It is an arithmetic number, because the mean of its divisors is an integer number (6359035368).

Almost surely, 2^25431214451 is an apocalyptic number.

25431214451 is a deficient number, since it is larger than the sum of its proper divisors (4927021).

25431214451 is an equidigital number, since it uses as much as digits as its factorization.

25431214451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4927020.

The product of its digits is 19200, while the sum is 32.

Subtracting from 25431214451 its reverse (15441213452), we obtain a palindrome (9990000999).

The spelling of 25431214451 in words is "twenty-five billion, four hundred thirty-one million, two hundred fourteen thousand, four hundred fifty-one".