25293221 has 2 divisors, whose sum is σ = 25293222. Its totient is φ = 25293220.

The previous prime is 25293211. The next prime is 25293239. The reversal of 25293221 is 12239252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 7230721 = 4250^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 25293221 - 2⁶ = 25293157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25293211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12646610 + 12646611.

It is an arithmetic number, because the mean of its divisors is an integer number (12646611).

Almost surely, 2^25293221 is an apocalyptic number.

It is an amenable number.

25293221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25293221 is an equidigital number, since it uses as much as digits as its factorization.

25293221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 25293221 is about 5029.2366219934. The cubic root of 25293221 is about 293.5405112083.

The spelling of 25293221 in words is "twenty-five million, two hundred ninety-three thousand, two hundred twenty-one".