254999221 has 2 divisors, whose sum is σ = 254999222. Its totient is φ = 254999220.

The previous prime is 254999207. The next prime is 254999231. The reversal of 254999221 is 122999452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253764900 + 1234321 = 15930^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 254999221 - 2¹⁹ = 254474933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254999231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127499610 + 127499611.

It is an arithmetic number, because the mean of its divisors is an integer number (127499611).

Almost surely, 2^254999221 is an apocalyptic number.

It is an amenable number.

254999221 is a deficient number, since it is larger than the sum of its proper divisors (1).

254999221 is an equidigital number, since it uses as much as digits as its factorization.

254999221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 254999221 is about 15968.6950312165. The cubic root of 254999221 is about 634.1319248002.

The spelling of 254999221 in words is "two hundred fifty-four million, nine hundred ninety-nine thousand, two hundred twenty-one".