2231305 has 4 divisors (see below), whose sum is σ = 2677572. Its totient is φ = 1785040.

The previous prime is 2231297. The next prime is 2231309. The reversal of 2231305 is 5031322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 620944 + 1610361 = 788^2 + 1269^2 .

It is not a de Polignac number, because 2231305 - 2³ = 2231297 is a prime.

It is a super-3 number, since 3×2231305³ = 33327141896879092875, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231309) 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, 223126 + ... + 223135.

It is an arithmetic number, because the mean of its divisors is an integer number (669393).

2^2231305 is an apocalyptic number.

It is an amenable number.

2231305 is a deficient number, since it is larger than the sum of its proper divisors (446267).

2231305 is an equidigital number, since it uses as much as digits as its factorization.

2231305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446266.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 2231305 is about 1493.7553347185. The cubic root of 2231305 is about 130.6731357284.

Adding to 2231305 its reverse (5031322), we get a palindrome (7262627).

The spelling of 2231305 in words is "two million, two hundred thirty-one thousand, three hundred five".