25440343 has 2 divisors, whose sum is σ = 25440344. Its totient is φ = 25440342.

The previous prime is 25440341. The next prime is 25440353. The reversal of 25440343 is 34304452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25440343 - 2¹ = 25440341 is a prime.

It is a super-2 number, since 2×25440343² = 1294422103915298, which contains 22 as substring.

Together with 25440341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720171 + 12720172.

It is an arithmetic number, because the mean of its divisors is an integer number (12720172).

Almost surely, 2^25440343 is an apocalyptic number.

25440343 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440343 is an equidigital number, since it uses as much as digits as its factorization.

25440343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 25440343 is about 5043.8420871395. The cubic root of 25440343 is about 294.1085527847.

Adding to 25440343 its reverse (34304452), we get a palindrome (59744795).

The spelling of 25440343 in words is "twenty-five million, four hundred forty thousand, three hundred forty-three".