231222340 has 12 divisors (see below), whose sum is σ = 485566956. Its totient is φ = 92488928.

The previous prime is 231222319. The next prime is 231222347. The reversal of 231222340 is 43222132.

It can be written as a sum of positive squares in 2 ways, for example, as 160123716 + 71098624 = 12654^2 + 8432^2 .

It is not an unprimeable number, because it can be changed into a prime (231222347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5780539 + ... + 5780578.

It is an arithmetic number, because the mean of its divisors is an integer number (40463913).

Almost surely, 2^231222340 is an apocalyptic number.

231222340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231222340 is an abundant number, since it is smaller than the sum of its proper divisors (254344616).

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

231222340 is a wasteful number, since it uses less digits than its factorization.

231222340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11561126 (or 11561124 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231222340 is about 15205.9968433510. The cubic root of 231222340 is about 613.7760397279.

Adding to 231222340 its reverse (43222132), we get a palindrome (274444472).

The spelling of 231222340 in words is "two hundred thirty-one million, two hundred twenty-two thousand, three hundred forty".