221020982 has 16 divisors (see below), whose sum is σ = 408039072. Its totient is φ = 87436800.

The previous prime is 221020957. The next prime is 221021033. The reversal of 221020982 is 289020122.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 607019 + ... + 607382.

It is an arithmetic number, because the mean of its divisors is an integer number (25502442).

Almost surely, 2^221020982 is an apocalyptic number.

221020982 is a deficient number, since it is larger than the sum of its proper divisors (187018090).

221020982 is a wasteful number, since it uses less digits than its factorization.

221020982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214423.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 221020982 is about 14866.7744315975. The cubic root of 221020982 is about 604.6134926290.

The spelling of 221020982 in words is "two hundred twenty-one million, twenty thousand, nine hundred eighty-two".