25243431 has 8 divisors (see below), whose sum is σ = 33884400. Its totient is φ = 16715712.

The previous prime is 25243429. The next prime is 25243481. The reversal of 25243431 is 13434252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25243431 - 2¹ = 25243429 is a prime.

It is a super-2 number, since 2×25243431² = 1274461617303522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27790 + ... + 28683.

It is an arithmetic number, because the mean of its divisors is an integer number (4235550).

Almost surely, 2^25243431 is an apocalyptic number.

25243431 is a deficient number, since it is larger than the sum of its proper divisors (8640969).

25243431 is a wasteful number, since it uses less digits than its factorization.

25243431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56625.

The product of its digits is 2880, while the sum is 24.

The square root of 25243431 is about 5024.2841281122. The cubic root of 25243431 is about 293.3477720452.

Adding to 25243431 its reverse (13434252), we get a palindrome (38677683).

The spelling of 25243431 in words is "twenty-five million, two hundred forty-three thousand, four hundred thirty-one".