221202313 has 8 divisors (see below), whose sum is σ = 233204000. Its totient is φ = 209236608.

The previous prime is 221202307. The next prime is 221202323. The reversal of 221202313 is 313202122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221202313 - 2¹³ = 221194121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4138 + ... + 21436.

It is an arithmetic number, because the mean of its divisors is an integer number (29150500).

Almost surely, 2^221202313 is an apocalyptic number.

It is an amenable number.

221202313 is a deficient number, since it is larger than the sum of its proper divisors (12001687).

221202313 is a wasteful number, since it uses less digits than its factorization.

221202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17991.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221202313 is about 14872.8717132906. The cubic root of 221202313 is about 604.7787939795.

Adding to 221202313 its reverse (313202122), we get a palindrome (534404435).

The spelling of 221202313 in words is "two hundred twenty-one million, two hundred two thousand, three hundred thirteen".