231344507 has 2 divisors, whose sum is σ = 231344508. Its totient is φ = 231344506.

The previous prime is 231344479. The next prime is 231344521. The reversal of 231344507 is 705443132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231344507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231344507.

It is not a weakly prime, because it can be changed into another prime (231344527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115672253 + 115672254.

It is an arithmetic number, because the mean of its divisors is an integer number (115672254).

Almost surely, 2^231344507 is an apocalyptic number.

231344507 is a deficient number, since it is larger than the sum of its proper divisors (1).

231344507 is an equidigital number, since it uses as much as digits as its factorization.

231344507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 231344507 is about 15210.0133793498. The cubic root of 231344507 is about 613.8841174847.

Adding to 231344507 its reverse (705443132), we get a palindrome (936787639).

The spelling of 231344507 in words is "two hundred thirty-one million, three hundred forty-four thousand, five hundred seven".