25550533 has 2 divisors, whose sum is σ = 25550534. Its totient is φ = 25550532.

The previous prime is 25550531. The next prime is 25550561. The reversal of 25550533 is 33505552.

It is an a-pointer prime, because the next prime (25550561) can be obtained adding 25550533 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20958084 + 4592449 = 4578^2 + 2143^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550533 - 2¹ = 25550531 is a prime.

Together with 25550531, 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 (25550531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775266 + 12775267.

It is an arithmetic number, because the mean of its divisors is an integer number (12775267).

Almost surely, 2^25550533 is an apocalyptic number.

It is an amenable number.

25550533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550533 is an equidigital number, since it uses as much as digits as its factorization.

25550533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11250, while the sum is 28.

The square root of 25550533 is about 5054.7535053650. The cubic root of 25550533 is about 294.5325662536.

The spelling of 25550533 in words is "twenty-five million, five hundred fifty thousand, five hundred thirty-three".