25550617 has 2 divisors, whose sum is σ = 25550618. Its totient is φ = 25550616.

The previous prime is 25550561. The next prime is 25550621. The reversal of 25550617 is 71605552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17799961 + 7750656 = 4219^2 + 2784^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550617 - 2²³ = 17162009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25550627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775308 + 12775309.

It is an arithmetic number, because the mean of its divisors is an integer number (12775309).

Almost surely, 2^25550617 is an apocalyptic number.

It is an amenable number.

25550617 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550617 is an equidigital number, since it uses as much as digits as its factorization.

25550617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 25550617 is about 5054.7618143687. The cubic root of 25550617 is about 294.5328890220.

The spelling of 25550617 in words is "twenty-five million, five hundred fifty thousand, six hundred seventeen".