221348682 has 12 divisors (see below), whose sum is σ = 479588850. Its totient is φ = 73782888.

The previous prime is 221348669. The next prime is 221348693. The reversal of 221348682 is 286843122.

It can be written as a sum of positive squares in only one way, i.e., 130165281 + 91183401 = 11409^2 + 9549^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6148557 + ... + 6148592.

Almost surely, 2^221348682 is an apocalyptic number.

221348682 is an abundant number, since it is smaller than the sum of its proper divisors (258240168).

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

221348682 is a wasteful number, since it uses less digits than its factorization.

221348682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297157 (or 12297154 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 221348682 is about 14877.7915699878. The cubic root of 221348682 is about 604.9121580910.

The spelling of 221348682 in words is "two hundred twenty-one million, three hundred forty-eight thousand, six hundred eighty-two".