311323122 has 32 divisors (see below), whose sum is σ = 754724160. Its totient is φ = 94340160.

The previous prime is 311323109. The next prime is 311323141. The reversal of 311323122 is 221323113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 311323095 and 311323104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261463 + ... + 262650.

It is an arithmetic number, because the mean of its divisors is an integer number (23585130).

Almost surely, 2^311323122 is an apocalyptic number.

311323122 is an abundant number, since it is smaller than the sum of its proper divisors (443401038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311323122 is a wasteful number, since it uses less digits than its factorization.

311323122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524135 (or 524129 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 311323122 is about 17644.3509940151. The cubic root of 311323122 is about 677.7514556133.

Adding to 311323122 its reverse (221323113), we get a palindrome (532646235).

Subtracting from 311323122 its reverse (221323113), we obtain a palindrome (90000009).

The spelling of 311323122 in words is "three hundred eleven million, three hundred twenty-three thousand, one hundred twenty-two".