254051221 has 2 divisors, whose sum is σ = 254051222. Its totient is φ = 254051220.

The previous prime is 254051209. The next prime is 254051243. The reversal of 254051221 is 122150452.

It is an a-pointer prime, because the next prime (254051243) can be obtained adding 254051221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184144900 + 69906321 = 13570^2 + 8361^2 .

It is a cyclic number.

It is not a de Polignac number, because 254051221 - 2⁷ = 254051093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 254051192 and 254051201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254051821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127025610 + 127025611.

It is an arithmetic number, because the mean of its divisors is an integer number (127025611).

Almost surely, 2^254051221 is an apocalyptic number.

It is an amenable number.

254051221 is a deficient number, since it is larger than the sum of its proper divisors (1).

254051221 is an equidigital number, since it uses as much as digits as its factorization.

254051221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 254051221 is about 15938.9843151940. The cubic root of 254051221 is about 633.3451203408.

The spelling of 254051221 in words is "two hundred fifty-four million, fifty-one thousand, two hundred twenty-one".