2145316247 has 2 divisors, whose sum is σ = 2145316248. Its totient is φ = 2145316246.

The previous prime is 2145316231. The next prime is 2145316273. The reversal of 2145316247 is 7426135412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145316247 - 2⁴ = 2145316231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145316297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072658123 + 1072658124.

It is an arithmetic number, because the mean of its divisors is an integer number (1072658124).

Almost surely, 2^2145316247 is an apocalyptic number.

2145316247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145316247 is an equidigital number, since it uses as much as digits as its factorization.

2145316247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 2145316247 is about 46317.5587331630. The cubic root of 2145316247 is about 1289.7249673061.

The spelling of 2145316247 in words is "two billion, one hundred forty-five million, three hundred sixteen thousand, two hundred forty-seven".