231531503223329 has 2 divisors, whose sum is σ = 231531503223330. Its totient is φ = 231531503223328.

The previous prime is 231531503223311. The next prime is 231531503223343. The reversal of 231531503223329 is 923322305135132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198289994076304 + 33241509147025 = 14081548^2 + 5765545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231531503223329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231531503223329.

It is not a weakly prime, because it can be changed into another prime (231531503423329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115765751611664 + 115765751611665.

It is an arithmetic number, because the mean of its divisors is an integer number (115765751611665).

Almost surely, 2^{231531503223329} is an apocalyptic number.

It is an amenable number.

231531503223329 is a deficient number, since it is larger than the sum of its proper divisors (1).

231531503223329 is an equidigital number, since it uses as much as digits as its factorization.

231531503223329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 44.

The spelling of 231531503223329 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred three million, two hundred twenty-three thousand, three hundred twenty-nine".