3111145217 has 2 divisors, whose sum is σ = 3111145218. Its totient is φ = 3111145216.

The previous prime is 3111145207. The next prime is 3111145229. The reversal of 3111145217 is 7125411113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3071819776 + 39325441 = 55424^2 + 6271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111145217 is a prime.

It is a super-2 number, since 2×3111145217² = 19358449122523954178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3111145207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555572608 + 1555572609.

It is an arithmetic number, because the mean of its divisors is an integer number (1555572609).

Almost surely, 2^3111145217 is an apocalyptic number.

It is an amenable number.

3111145217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111145217 is an equidigital number, since it uses as much as digits as its factorization.

3111145217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 26.

The square root of 3111145217 is about 55777.6408339399. The cubic root of 3111145217 is about 1459.8450478262.

The spelling of 3111145217 in words is "three billion, one hundred eleven million, one hundred forty-five thousand, two hundred seventeen".