313143222 has 40 divisors (see below), whose sum is σ = 730657656. Its totient is φ = 89465376.

The previous prime is 313143221. The next prime is 313143223. The reversal of 313143222 is 222341313.

It is an interprime number because it is at equal distance from previous prime (313143221) and next prime (313143223).

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 (313143221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3538 + ... + 25274.

Almost surely, 2^313143222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313143222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365328828).

313143222 is an abundant number, since it is smaller than the sum of its proper divisors (417514434).

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

313143222 is an equidigital number, since it uses as much as digits as its factorization.

313143222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770 (or 21749 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 313143222 is about 17695.8532430623. The cubic root of 313143222 is about 679.0696779028.

Adding to 313143222 its reverse (222341313), we get a palindrome (535484535).

The spelling of 313143222 in words is "three hundred thirteen million, one hundred forty-three thousand, two hundred twenty-two".