25434551 has 2 divisors, whose sum is σ = 25434552. Its totient is φ = 25434550.

The previous prime is 25434547. The next prime is 25434553. The reversal of 25434551 is 15543452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25434551 - 2² = 25434547 is a prime.

Together with 25434553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25434553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12717275 + 12717276.

It is an arithmetic number, because the mean of its divisors is an integer number (12717276).

Almost surely, 2^25434551 is an apocalyptic number.

25434551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25434551 is an equidigital number, since it uses as much as digits as its factorization.

25434551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 29.

The square root of 25434551 is about 5043.2678889783. The cubic root of 25434551 is about 294.0862312037.

The spelling of 25434551 in words is "twenty-five million, four hundred thirty-four thousand, five hundred fifty-one".