126517697231 has 2 divisors, whose sum is σ = 126517697232. Its totient is φ = 126517697230.

The previous prime is 126517697227. The next prime is 126517697291. The reversal of 126517697231 is 132796715621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126517697231 - 2² = 126517697227 is a prime.

It is a super-2 number, since 2×126517697231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126517697231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126517697221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63258848615 + 63258848616.

It is an arithmetic number, because the mean of its divisors is an integer number (63258848616).

Almost surely, 2^126517697231 is an apocalyptic number.

126517697231 is a deficient number, since it is larger than the sum of its proper divisors (1).

126517697231 is an equidigital number, since it uses as much as digits as its factorization.

126517697231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 50.

The spelling of 126517697231 in words is "one hundred twenty-six billion, five hundred seventeen million, six hundred ninety-seven thousand, two hundred thirty-one".