25430551 has 2 divisors, whose sum is σ = 25430552. Its totient is φ = 25430550.

The previous prime is 25430549. The next prime is 25430557. The reversal of 25430551 is 15503452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25430551 - 2¹ = 25430549 is a prime.

Together with 25430549, 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 (25430557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715275 + 12715276.

It is an arithmetic number, because the mean of its divisors is an integer number (12715276).

Almost surely, 2^25430551 is an apocalyptic number.

25430551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25430551 is an equidigital number, since it uses as much as digits as its factorization.

25430551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25430551 is about 5042.8713051197. The cubic root of 25430551 is about 294.0708137689.

The spelling of 25430551 in words is "twenty-five million, four hundred thirty thousand, five hundred fifty-one".