221937682 has 4 divisors (see below), whose sum is σ = 332906526. Its totient is φ = 110968840.

The previous prime is 221937641. The next prime is 221937719. The reversal of 221937682 is 286739122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 143065521 + 78872161 = 11961^2 + 8881^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55484419 + ... + 55484422.

Almost surely, 2^221937682 is an apocalyptic number.

221937682 is a deficient number, since it is larger than the sum of its proper divisors (110968844).

221937682 is a wasteful number, since it uses less digits than its factorization.

221937682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110968843.

The product of its digits is 72576, while the sum is 40.

The square root of 221937682 is about 14897.5730238183. The cubic root of 221937682 is about 605.4482319103.

The spelling of 221937682 in words is "two hundred twenty-one million, nine hundred thirty-seven thousand, six hundred eighty-two".