25890551 has 2 divisors, whose sum is σ = 25890552. Its totient is φ = 25890550.

The previous prime is 25890547. The next prime is 25890563. The reversal of 25890551 is 15509852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25890551 - 2² = 25890547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25890251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12945275 + 12945276.

It is an arithmetic number, because the mean of its divisors is an integer number (12945276).

Almost surely, 2^25890551 is an apocalyptic number.

25890551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25890551 is an equidigital number, since it uses as much as digits as its factorization.

25890551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 25890551 is about 5088.2758376487. The cubic root of 25890551 is about 295.8333270030.

It can be divided in two parts, 258 and 90551, that added together give a palindrome (90809).

The spelling of 25890551 in words is "twenty-five million, eight hundred ninety thousand, five hundred fifty-one".