221022254 has 4 divisors (see below), whose sum is σ = 331533384. Its totient is φ = 110511126.

The previous prime is 221022233. The next prime is 221022293. The reversal of 221022254 is 452220122.

221022254 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255562 + ... + 55255565.

It is an arithmetic number, because the mean of its divisors is an integer number (82883346).

Almost surely, 2^221022254 is an apocalyptic number.

221022254 is a deficient number, since it is larger than the sum of its proper divisors (110511130).

221022254 is a wasteful number, since it uses less digits than its factorization.

221022254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110511129.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 221022254 is about 14866.8172114949. The cubic root of 221022254 is about 604.6146524991.

Adding to 221022254 its reverse (452220122), we get a palindrome (673242376).

The spelling of 221022254 in words is "two hundred twenty-one million, twenty-two thousand, two hundred fifty-four".