311442 has 8 divisors (see below), whose sum is σ = 622896. Its totient is φ = 103812.

The previous prime is 311419. The next prime is 311447. The reversal of 311442 is 244113.

It is a sphenic number, since it is the product of 3 distinct primes.

311442 is an admirable number.

It is a super-2 number, since 2×311442² = 193992238728, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311442.

It is not an unprimeable number, because it can be changed into a prime (311447) 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, 25948 + ... + 25959.

It is an arithmetic number, because the mean of its divisors is an integer number (77862).

2³¹¹⁴⁴² is an apocalyptic number.

311442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

311442 is a wasteful number, since it uses less digits than its factorization.

311442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51912.

The product of its digits is 96, while the sum is 15.

The square root of 311442 is about 558.0698880965. The cubic root of 311442 is about 67.7837710567.

Adding to 311442 its reverse (244113), we get a palindrome (555555).

The spelling of 311442 in words is "three hundred eleven thousand, four hundred forty-two", and thus it is an iban number.