311331342 has 32 divisors (see below), whose sum is σ = 714408192. Its totient is φ = 88602624.

The previous prime is 311331341. The next prime is 311331367. The reversal of 311331342 is 243133113.

311331342 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311331341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3628 + ... + 25215.

It is an arithmetic number, because the mean of its divisors is an integer number (22325256).

Almost surely, 2^311331342 is an apocalyptic number.

311331342 is an abundant number, since it is smaller than the sum of its proper divisors (403076850).

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

311331342 is a wasteful number, since it uses less digits than its factorization.

311331342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29112.

The product of its digits is 648, while the sum is 21.

The square root of 311331342 is about 17644.5839282200. The cubic root of 311331342 is about 677.7574205497.

Adding to 311331342 its reverse (243133113), we get a palindrome (554464455).

The spelling of 311331342 in words is "three hundred eleven million, three hundred thirty-one thousand, three hundred forty-two".