254223221 has 6 divisors (see below), whose sum is σ = 295729110. Its totient is φ = 217905576.

The previous prime is 254223217. The next prime is 254223227. The reversal of 254223221 is 122322452.

It can be written as a sum of positive squares in only one way, i.e., 232227121 + 21996100 = 15239^2 + 4690^2 .

It is not a de Polignac number, because 254223221 - 2² = 254223217 is a prime.

It is a super-2 number, since 2×254223221² = 129258892191229682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254223227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2594066 + ... + 2594163.

It is an arithmetic number, because the mean of its divisors is an integer number (49288185).

Almost surely, 2^254223221 is an apocalyptic number.

It is an amenable number.

254223221 is a deficient number, since it is larger than the sum of its proper divisors (41505889).

254223221 is an equidigital number, since it uses as much as digits as its factorization.

254223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188243 (or 5188236 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 254223221 is about 15944.3789781854. The cubic root of 254223221 is about 633.4880190646.

Adding to 254223221 its reverse (122322452), we get a palindrome (376545673).

The spelling of 254223221 in words is "two hundred fifty-four million, two hundred twenty-three thousand, two hundred twenty-one".