221954444 has 6 divisors (see below), whose sum is σ = 388420284. Its totient is φ = 110977220.

The previous prime is 221954441. The next prime is 221954461. The reversal of 221954444 is 444459122.

It is a super-2 number, since 2×221954444² = 98527550422698272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221954441) by changing a digit.

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 as a sum of consecutive naturals, namely, 27744302 + ... + 27744309.

It is an arithmetic number, because the mean of its divisors is an integer number (64736714).

Almost surely, 2^221954444 is an apocalyptic number.

It is an amenable number.

221954444 is a deficient number, since it is larger than the sum of its proper divisors (166465840).

221954444 is a wasteful number, since it uses less digits than its factorization.

221954444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55488615 (or 55488613 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 221954444 is about 14898.1355880526. The cubic root of 221954444 is about 605.4634738282.

The spelling of 221954444 in words is "two hundred twenty-one million, nine hundred fifty-four thousand, four hundred forty-four".