2168431249 has 2 divisors, whose sum is σ = 2168431250. Its totient is φ = 2168431248.

The previous prime is 2168431229. The next prime is 2168431267. The reversal of 2168431249 is 9421348612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2084379025 + 84052224 = 45655^2 + 9168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168431249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168431229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084215624 + 1084215625.

It is an arithmetic number, because the mean of its divisors is an integer number (1084215625).

Almost surely, 2^2168431249 is an apocalyptic number.

It is an amenable number.

2168431249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168431249 is an equidigital number, since it uses as much as digits as its factorization.

2168431249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 2168431249 is about 46566.4176096895. The cubic root of 2168431249 is about 1294.3405355169.

The spelling of 2168431249 in words is "two billion, one hundred sixty-eight million, four hundred thirty-one thousand, two hundred forty-nine".