2231316 has 18 divisors (see below), whose sum is σ = 5640362. Its totient is φ = 743760.

The previous prime is 2231311. The next prime is 2231329. The reversal of 2231316 is 6131322.

It can be written as a sum of positive squares in only one way, i.e., 1971216 + 260100 = 1404^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×2231316³ = 33327634792787287488, which contains 333 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30955 + ... + 31026.

2^2231316 is an apocalyptic number.

It is an amenable number.

2231316 is an abundant number, since it is smaller than the sum of its proper divisors (3409046).

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

2231316 is a wasteful number, since it uses less digits than its factorization.

2231316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61991 (or 61986 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2231316 is about 1493.7590167092. The cubic root of 2231316 is about 130.6733504610.

Adding to 2231316 its reverse (6131322), we get a palindrome (8362638).

The spelling of 2231316 in words is "two million, two hundred thirty-one thousand, three hundred sixteen".