311222223 has 64 divisors (see below), whose sum is σ = 545664000. Its totient is φ = 173467008.

The previous prime is 311222137. The next prime is 311222321. The reversal of 311222223 is 322222113.

It is not a de Polignac number, because 311222223 - 2⁹ = 311221711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311222196 and 311222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152373 + ... + 154401.

It is an arithmetic number, because the mean of its divisors is an integer number (8526000).

Almost surely, 2^311222223 is an apocalyptic number.

311222223 is a deficient number, since it is larger than the sum of its proper divisors (234441777).

311222223 is a wasteful number, since it uses less digits than its factorization.

311222223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093 (or 2087 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 311222223 is about 17641.4915185763. The cubic root of 311222223 is about 677.6782285507.

Adding to 311222223 its reverse (322222113), we get a palindrome (633444336).

The spelling of 311222223 in words is "three hundred eleven million, two hundred twenty-two thousand, two hundred twenty-three".