231740507 has 2 divisors, whose sum is σ = 231740508. Its totient is φ = 231740506.

The previous prime is 231740489. The next prime is 231740533. The reversal of 231740507 is 705047132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231740507 - 2¹⁰ = 231739483 is a prime.

It is equal to p_12733094 and since 231740507 and 12733094 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231740507.

It is not a weakly prime, because it can be changed into another prime (231740567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115870253 + 115870254.

It is an arithmetic number, because the mean of its divisors is an integer number (115870254).

Almost surely, 2^231740507 is an apocalyptic number.

231740507 is a deficient number, since it is larger than the sum of its proper divisors (1).

231740507 is an equidigital number, since it uses as much as digits as its factorization.

231740507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 231740507 is about 15223.0255534174. The cubic root of 231740507 is about 614.2341863626.

Adding to 231740507 its reverse (705047132), we get a palindrome (936787639).

It can be divided in two parts, 2317 and 40507, that added together give a palindrome (42824).

The spelling of 231740507 in words is "two hundred thirty-one million, seven hundred forty thousand, five hundred seven".