311242122 has 16 divisors (see below), whose sum is σ = 691649280. Its totient is φ = 103747356.

The previous prime is 311242117. The next prime is 311242147. The reversal of 311242122 is 221242113.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 311242095 and 311242104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2881818 + ... + 2881925.

It is an arithmetic number, because the mean of its divisors is an integer number (43228080).

Almost surely, 2^311242122 is an apocalyptic number.

311242122 is an abundant number, since it is smaller than the sum of its proper divisors (380407158).

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

311242122 is a wasteful number, since it uses less digits than its factorization.

311242122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763754 (or 5763748 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 311242122 is about 17642.0554924873. The cubic root of 311242122 is about 677.6926714265.

Adding to 311242122 its reverse (221242113), we get a palindrome (532484235).

Subtracting from 311242122 its reverse (221242113), we obtain a palindrome (90000009).

It can be divided in two parts, 311242 and 122, that added together give a square (311364 = 558²).

The spelling of 311242122 in words is "three hundred eleven million, two hundred forty-two thousand, one hundred twenty-two".