221982644244 has 12 divisors (see below), whose sum is σ = 517959503264. Its totient is φ = 73994214744.

The previous prime is 221982644243. The next prime is 221982644249. The reversal of 221982644244 is 442446289122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 221982644193 and 221982644202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221982644243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9249276832 + ... + 9249276855.

Almost surely, 2^221982644244 is an apocalyptic number.

It is an amenable number.

221982644244 is an abundant number, since it is smaller than the sum of its proper divisors (295976859020).

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

221982644244 is a wasteful number, since it uses less digits than its factorization.

221982644244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498553694 (or 18498553692 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The spelling of 221982644244 in words is "two hundred twenty-one billion, nine hundred eighty-two million, six hundred forty-four thousand, two hundred forty-four".