221022366 has 16 divisors (see below), whose sum is σ = 442589184. Its totient is φ = 73583384.

The previous prime is 221022359. The next prime is 221022379. The reversal of 221022366 is 663220122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17310 + ... + 27233.

It is an arithmetic number, because the mean of its divisors is an integer number (27661824).

Almost surely, 2^221022366 is an apocalyptic number.

221022366 is an abundant number, since it is smaller than the sum of its proper divisors (221566818).

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

221022366 is a wasteful number, since it uses less digits than its factorization.

221022366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45375.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 221022366 is about 14866.8209782724. The cubic root of 221022366 is about 604.6147546258.

Adding to 221022366 its reverse (663220122), we get a palindrome (884242488).

The spelling of 221022366 in words is "two hundred twenty-one million, twenty-two thousand, three hundred sixty-six".