231221767459 has 2 divisors, whose sum is σ = 231221767460. Its totient is φ = 231221767458.

The previous prime is 231221767369. The next prime is 231221767493. The reversal of 231221767459 is 954767122132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231221767459 is a prime.

It is not a weakly prime, because it can be changed into another prime (231221765459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610883729 + 115610883730.

It is an arithmetic number, because the mean of its divisors is an integer number (115610883730).

Almost surely, 2^231221767459 is an apocalyptic number.

231221767459 is a deficient number, since it is larger than the sum of its proper divisors (1).

231221767459 is an equidigital number, since it uses as much as digits as its factorization.

231221767459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The spelling of 231221767459 in words is "two hundred thirty-one billion, two hundred twenty-one million, seven hundred sixty-seven thousand, four hundred fifty-nine".