2311221673 has 2 divisors, whose sum is σ = 2311221674. Its totient is φ = 2311221672.

The previous prime is 2311221643. The next prime is 2311221713. The reversal of 2311221673 is 3761221132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255426624 + 1055795049 = 35432^2 + 32493^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311221673 - 2⁵ = 2311221641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311221643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155610836 + 1155610837.

It is an arithmetic number, because the mean of its divisors is an integer number (1155610837).

Almost surely, 2^2311221673 is an apocalyptic number.

It is an amenable number.

2311221673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311221673 is an equidigital number, since it uses as much as digits as its factorization.

2311221673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 2311221673 is about 48075.1669055865. The cubic root of 2311221673 is about 1322.1494046728.

The spelling of 2311221673 in words is "two billion, three hundred eleven million, two hundred twenty-one thousand, six hundred seventy-three".