221314311 has 12 divisors (see below), whose sum is σ = 321444760. Its totient is φ = 146726640.

The previous prime is 221314307. The next prime is 221314367. The reversal of 221314311 is 113413122.

It is not a de Polignac number, because 221314311 - 2² = 221314307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221314111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66301 + ... + 69558.

Almost surely, 2^221314311 is an apocalyptic number.

221314311 is a deficient number, since it is larger than the sum of its proper divisors (100130449).

221314311 is a wasteful number, since it uses less digits than its factorization.

221314311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136046 (or 136043 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 221314311 is about 14876.6364141899. The cubic root of 221314311 is about 604.8808462382.

Adding to 221314311 its reverse (113413122), we get a palindrome (334727433).

The spelling of 221314311 in words is "two hundred twenty-one million, three hundred fourteen thousand, three hundred eleven".