221400082 has 16 divisors (see below), whose sum is σ = 349399512. Its totient is φ = 105079680.

The previous prime is 221400079. The next prime is 221400089. The reversal of 221400082 is 280004122.

It can be written as a sum of positive squares in 4 ways, for example, as 169286121 + 52113961 = 13011^2 + 7219^2 .

It is not an unprimeable number, because it can be changed into a prime (221400089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33453 + ... + 39520.

Almost surely, 2^221400082 is an apocalyptic number.

221400082 is a deficient number, since it is larger than the sum of its proper divisors (127999430).

221400082 is a wasteful number, since it uses less digits than its factorization.

221400082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73053.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 221400082 is about 14879.5188766304. The cubic root of 221400082 is about 604.9589772517.

The spelling of 221400082 in words is "two hundred twenty-one million, four hundred thousand, eighty-two".