254551221 has 8 divisors (see below), whose sum is σ = 377112960. Its totient is φ = 169700796.

The previous prime is 254551211. The next prime is 254551223. The reversal of 254551221 is 122155452.

254551221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-254551221 is a prime.

It is a super-2 number, since 2×254551221² = 129592648225181682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9427823 = 254551221 / (2 + 5 + 4 + 5 + 5 + 1 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254551223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4713885 + ... + 4713938.

It is an arithmetic number, because the mean of its divisors is an integer number (47139120).

Almost surely, 2^254551221 is an apocalyptic number.

It is an amenable number.

254551221 is a deficient number, since it is larger than the sum of its proper divisors (122561739).

254551221 is an equidigital number, since it uses as much as digits as its factorization.

254551221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427832 (or 9427826 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 254551221 is about 15954.6614191590. The cubic root of 254551221 is about 633.7603450571.

The spelling of 254551221 in words is "two hundred fifty-four million, five hundred fifty-one thousand, two hundred twenty-one".