221442245 has 16 divisors (see below), whose sum is σ = 280560000. Its totient is φ = 167323968.

The previous prime is 221442227. The next prime is 221442253. The reversal of 221442245 is 542244122.

221442245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221442245 - 2⁶ = 221442181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29816 + ... + 36494.

It is an arithmetic number, because the mean of its divisors is an integer number (17535000).

Almost surely, 2^221442245 is an apocalyptic number.

It is an amenable number.

221442245 is a deficient number, since it is larger than the sum of its proper divisors (59117755).

221442245 is a wasteful number, since it uses less digits than its factorization.

221442245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7052.

The product of its digits is 5120, while the sum is 26.

The square root of 221442245 is about 14880.9356224668. The cubic root of 221442245 is about 604.9973772170.

Adding to 221442245 its reverse (542244122), we get a palindrome (763686367).

It can be divided in two parts, 22144 and 2245, that added together give a cube (24389 = 29³).

The spelling of 221442245 in words is "two hundred twenty-one million, four hundred forty-two thousand, two hundred forty-five".