25255553 has 2 divisors, whose sum is σ = 25255554. Its totient is φ = 25255552.

The previous prime is 25255547. The next prime is 25255561. The reversal of 25255553 is 35555252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25170289 + 85264 = 5017^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 25255553 - 2²⁰ = 24206977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25255513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627776 + 12627777.

It is an arithmetic number, because the mean of its divisors is an integer number (12627777).

Almost surely, 2^25255553 is an apocalyptic number.

It is an amenable number.

25255553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255553 is an equidigital number, since it uses as much as digits as its factorization.

25255553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37500, while the sum is 32.

The square root of 25255553 is about 5025.4903243365. The cubic root of 25255553 is about 293.3947201357.

The spelling of 25255553 in words is "twenty-five million, two hundred fifty-five thousand, five hundred fifty-three".