25427551 has 2 divisors, whose sum is σ = 25427552. Its totient is φ = 25427550.

The previous prime is 25427539. The next prime is 25427593. The reversal of 25427551 is 15572452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25427551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25427531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713775 + 12713776.

It is an arithmetic number, because the mean of its divisors is an integer number (12713776).

Almost surely, 2^25427551 is an apocalyptic number.

25427551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25427551 is an equidigital number, since it uses as much as digits as its factorization.

25427551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 31.

The square root of 25427551 is about 5042.5738467572. The cubic root of 25427551 is about 294.0592496318.

The spelling of 25427551 in words is "twenty-five million, four hundred twenty-seven thousand, five hundred fifty-one".