313811442 has 64 divisors (see below), whose sum is σ = 810547200. Its totient is φ = 88134480.

The previous prime is 313811441. The next prime is 313811453. The reversal of 313811442 is 244118313.

It is a super-2 number, since 2×313811442² = 196955242260238728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (313811441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15267 + ... + 29337.

It is an arithmetic number, because the mean of its divisors is an integer number (12664800).

Almost surely, 2^313811442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313811442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405273600).

313811442 is an abundant number, since it is smaller than the sum of its proper divisors (496735758).

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

313811442 is a wasteful number, since it uses less digits than its factorization.

313811442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14148 (or 14142 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 313811442 is about 17714.7238759175. The cubic root of 313811442 is about 679.5523596530.

Adding to 313811442 its reverse (244118313), we get a palindrome (557929755).

It can be divided in two parts, 31381 and 1442, that added together give a palindrome (32823).

The spelling of 313811442 in words is "three hundred thirteen million, eight hundred eleven thousand, four hundred forty-two".