25450431 has 4 divisors (see below), whose sum is σ = 33933912. Its totient is φ = 16966952.

The previous prime is 25450387. The next prime is 25450457. The reversal of 25450431 is 13405452.

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 25450431 - 2⁷ = 25450303 is a prime.

It is a super-2 number, since 2×25450431² = 1295448876171522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25450471) 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, 4241736 + ... + 4241741.

It is an arithmetic number, because the mean of its divisors is an integer number (8483478).

Almost surely, 2^25450431 is an apocalyptic number.

25450431 is a deficient number, since it is larger than the sum of its proper divisors (8483481).

25450431 is an equidigital number, since it uses as much as digits as its factorization.

25450431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483480.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25450431 is about 5044.8420193302. The cubic root of 25450431 is about 294.1474224781.

Adding to 25450431 its reverse (13405452), we get a palindrome (38855883).

The spelling of 25450431 in words is "twenty-five million, four hundred fifty thousand, four hundred thirty-one".