221377982 has 24 divisors (see below), whose sum is σ = 387704880. Its totient is φ = 94526880.

The previous prime is 221377963. The next prime is 221377997. The reversal of 221377982 is 289773122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23519 + ... + 31557.

It is an arithmetic number, because the mean of its divisors is an integer number (16154370).

Almost surely, 2^221377982 is an apocalyptic number.

221377982 is a deficient number, since it is larger than the sum of its proper divisors (166326898).

221377982 is a wasteful number, since it uses less digits than its factorization.

221377982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8336 (or 8329 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 221377982 is about 14878.7762265584. The cubic root of 221377982 is about 604.9388477225.

The spelling of 221377982 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, nine hundred eighty-two".