231313240409 has 2 divisors, whose sum is σ = 231313240410. Its totient is φ = 231313240408.

The previous prime is 231313240351. The next prime is 231313240441. The reversal of 231313240409 is 904042313132.

It is an a-pointer prime, because the next prime (231313240441) can be obtained adding 231313240409 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121257168400 + 110056072009 = 348220^2 + 331747^2 .

It is a cyclic number.

It is not a de Polignac number, because 231313240409 - 2²⁴ = 231296463193 is a prime.

It is not a weakly prime, because it can be changed into another prime (231313240469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656620204 + 115656620205.

It is an arithmetic number, because the mean of its divisors is an integer number (115656620205).

Almost surely, 2^231313240409 is an apocalyptic number.

It is an amenable number.

231313240409 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313240409 is an equidigital number, since it uses as much as digits as its factorization.

231313240409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 231313240409 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred forty thousand, four hundred nine".