231122313 has 12 divisors (see below), whose sum is σ = 342866628. Its totient is φ = 149916960.

The previous prime is 231122303. The next prime is 231122323. The reversal of 231122313 is 313221132.

231122313 is a `hidden beast` number, since 231 + 122 + 313 = 666.

231122313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231122303) and next prime (231122323).

It can be written as a sum of positive squares in 2 ways, for example, as 173923344 + 57198969 = 13188^2 + 7563^2 .

It is not a de Polignac number, because 231122313 - 2⁹ = 231121801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231122303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346698 + ... + 347363.

It is an arithmetic number, because the mean of its divisors is an integer number (28572219).

Almost surely, 2^231122313 is an apocalyptic number.

It is an amenable number.

231122313 is a deficient number, since it is larger than the sum of its proper divisors (111744315).

231122313 is a wasteful number, since it uses less digits than its factorization.

231122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694104 (or 694101 counting only the distinct ones).

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

The square root of 231122313 is about 15202.7074233506. The cubic root of 231122313 is about 613.6875202664.

Adding to 231122313 its reverse (313221132), we get a palindrome (544343445).

It can be divided in two parts, 23112 and 2313, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 231122313 in words is "two hundred thirty-one million, one hundred twenty-two thousand, three hundred thirteen".