311421223 has 4 divisors (see below), whose sum is σ = 311466240. Its totient is φ = 311376208.

The previous prime is 311421211. The next prime is 311421241. The reversal of 311421223 is 322124113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 311421223 - 2¹⁷ = 311290151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311421223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311427223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9703 + ... + 26776.

It is an arithmetic number, because the mean of its divisors is an integer number (77866560).

Almost surely, 2^311421223 is an apocalyptic number.

311421223 is a deficient number, since it is larger than the sum of its proper divisors (45017).

311421223 is an equidigital number, since it uses as much as digits as its factorization.

311421223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45016.

The product of its digits is 288, while the sum is 19.

The square root of 311421223 is about 17647.1307299515. The cubic root of 311421223 is about 677.8226368699.

Adding to 311421223 its reverse (322124113), we get a palindrome (633545336).

The spelling of 311421223 in words is "three hundred eleven million, four hundred twenty-one thousand, two hundred twenty-three".