221504982 has 32 divisors (see below), whose sum is σ = 459924480. Its totient is φ = 71043360.

The previous prime is 221504981. The next prime is 221504999. The reversal of 221504982 is 289405122.

221504982 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221504981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29968 + ... + 36620.

It is an arithmetic number, because the mean of its divisors is an integer number (14372640).

Almost surely, 2^221504982 is an apocalyptic number.

221504982 is an abundant number, since it is smaller than the sum of its proper divisors (238419498).

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

221504982 is a wasteful number, since it uses less digits than its factorization.

221504982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 221504982 is about 14883.0434387594. The cubic root of 221504982 is about 605.0545059378.

The spelling of 221504982 in words is "two hundred twenty-one million, five hundred four thousand, nine hundred eighty-two".