221022250 has 96 divisors (see below), whose sum is σ = 456468480. Its totient is φ = 80028000.

The previous prime is 221022233. The next prime is 221022293. The reversal of 221022250 is 52220122.

221022250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2797711 + ... + 2797789.

It is an arithmetic number, because the mean of its divisors is an integer number (4754880).

Almost surely, 2^221022250 is an apocalyptic number.

221022250 is an abundant number, since it is smaller than the sum of its proper divisors (235446230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221022250 is a wasteful number, since it uses less digits than its factorization.

221022250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 221022250 is about 14866.8170769671. The cubic root of 221022250 is about 604.6146488517.

Adding to 221022250 its reverse (52220122), we get a palindrome (273242372).

The spelling of 221022250 in words is "two hundred twenty-one million, twenty-two thousand, two hundred fifty".