231340442 has 16 divisors (see below), whose sum is σ = 355835592. Its totient is φ = 112756800.

The previous prime is 231340429. The next prime is 231340477. The reversal of 231340442 is 244043132.

It can be written as a sum of positive squares in 4 ways, for example, as 220849321 + 10491121 = 14861^2 + 3239^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9692 + ... + 23592.

Almost surely, 2^231340442 is an apocalyptic number.

231340442 is a deficient number, since it is larger than the sum of its proper divisors (124495150).

231340442 is a wasteful number, since it uses less digits than its factorization.

231340442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14113.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 231340442 is about 15209.8797496890. The cubic root of 231340442 is about 613.8805219040.

Adding to 231340442 its reverse (244043132), we get a palindrome (475383574).

The spelling of 231340442 in words is "two hundred thirty-one million, three hundred forty thousand, four hundred forty-two".