2311203217 has 2 divisors, whose sum is σ = 2311203218. Its totient is φ = 2311203216.

The previous prime is 2311203157. The next prime is 2311203269. The reversal of 2311203217 is 7123021132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2227462416 + 83740801 = 47196^2 + 9151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311203217 is a prime.

It is a super-2 number, since 2×2311203217² = 10683320620542298178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2311206217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155601608 + 1155601609.

It is an arithmetic number, because the mean of its divisors is an integer number (1155601609).

Almost surely, 2^2311203217 is an apocalyptic number.

It is an amenable number.

2311203217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311203217 is an equidigital number, since it uses as much as digits as its factorization.

2311203217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 2311203217 is about 48074.9749557917. The cubic root of 2311203217 is about 1322.1458853718.

Adding to 2311203217 its reverse (7123021132), we get a palindrome (9434224349).

The spelling of 2311203217 in words is "two billion, three hundred eleven million, two hundred three thousand, two hundred seventeen".