254451221 has 2 divisors, whose sum is σ = 254451222. Its totient is φ = 254451220.

The previous prime is 254451217. The next prime is 254451229. The reversal of 254451221 is 122154452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214622500 + 39828721 = 14650^2 + 6311^2 .

It is a cyclic number.

It is not a de Polignac number, because 254451221 - 2² = 254451217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254451229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127225610 + 127225611.

It is an arithmetic number, because the mean of its divisors is an integer number (127225611).

Almost surely, 2^254451221 is an apocalyptic number.

It is an amenable number.

254451221 is a deficient number, since it is larger than the sum of its proper divisors (1).

254451221 is an equidigital number, since it uses as much as digits as its factorization.

254451221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 26.

The square root of 254451221 is about 15951.5272309582. The cubic root of 254451221 is about 633.6773436411.

The spelling of 254451221 in words is "two hundred fifty-four million, four hundred fifty-one thousand, two hundred twenty-one".