25505633 has 2 divisors, whose sum is σ = 25505634. Its totient is φ = 25505632.

The previous prime is 25505629. The next prime is 25505639. The reversal of 25505633 is 33650552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 11607649 = 3728^2 + 3407^2 .

It is a cyclic number.

It is not a de Polignac number, because 25505633 - 2² = 25505629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25505596 and 25505605.

It is not a weakly prime, because it can be changed into another prime (25505639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752816 + 12752817.

It is an arithmetic number, because the mean of its divisors is an integer number (12752817).

Almost surely, 2^25505633 is an apocalyptic number.

It is an amenable number.

25505633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25505633 is an equidigital number, since it uses as much as digits as its factorization.

25505633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 29.

The square root of 25505633 is about 5050.3101884934. The cubic root of 25505633 is about 294.3599375485.

The spelling of 25505633 in words is "twenty-five million, five hundred five thousand, six hundred thirty-three".