221413402 has 16 divisors (see below), whose sum is σ = 389825280. Its totient is φ = 92326608.

The previous prime is 221413391. The next prime is 221413417. The reversal of 221413402 is 204314122.

It is a self number, because there is not a number n which added to its sum of digits gives 221413402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213202 + ... + 214237.

It is an arithmetic number, because the mean of its divisors is an integer number (24364080).

Almost surely, 2^221413402 is an apocalyptic number.

221413402 is a deficient number, since it is larger than the sum of its proper divisors (168411878).

221413402 is a wasteful number, since it uses less digits than its factorization.

221413402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427485.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221413402 is about 14879.9664650160. The cubic root of 221413402 is about 604.9711089726.

Adding to 221413402 its reverse (204314122), we get a palindrome (425727524).

The spelling of 221413402 in words is "two hundred twenty-one million, four hundred thirteen thousand, four hundred two".