25893221 has 2 divisors, whose sum is σ = 25893222. Its totient is φ = 25893220.

The previous prime is 25893211. The next prime is 25893233. The reversal of 25893221 is 12239852.

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., 21436900 + 4456321 = 4630^2 + 2111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25893221 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 (25893211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12946610 + 12946611.

It is an arithmetic number, because the mean of its divisors is an integer number (12946611).

Almost surely, 2^25893221 is an apocalyptic number.

It is an amenable number.

25893221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25893221 is an equidigital number, since it uses as much as digits as its factorization.

25893221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 25893221 is about 5088.5381987365. The cubic root of 25893221 is about 295.8434960647.

The spelling of 25893221 in words is "twenty-five million, eight hundred ninety-three thousand, two hundred twenty-one".