25073551 has 2 divisors, whose sum is σ = 25073552. Its totient is φ = 25073550.

The previous prime is 25073549. The next prime is 25073557. The reversal of 25073551 is 15537052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25073551 - 2¹ = 25073549 is a prime.

Together with 25073549, 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 (25073557) 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, 12536775 + 12536776.

It is an arithmetic number, because the mean of its divisors is an integer number (12536776).

Almost surely, 2^25073551 is an apocalyptic number.

25073551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25073551 is an equidigital number, since it uses as much as digits as its factorization.

25073551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 25073551 is about 5007.3496981936. The cubic root of 25073551 is about 292.6882456391.

The spelling of 25073551 in words is "twenty-five million, seventy-three thousand, five hundred fifty-one".