2216331493 has 2 divisors, whose sum is σ = 2216331494. Its totient is φ = 2216331492.

The previous prime is 2216331479. The next prime is 2216331521. The reversal of 2216331493 is 3941336122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276418529 + 939912964 = 35727^2 + 30658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216331493 - 2⁵ = 2216331461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2216331193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108165746 + 1108165747.

It is an arithmetic number, because the mean of its divisors is an integer number (1108165747).

Almost surely, 2^2216331493 is an apocalyptic number.

It is an amenable number.

2216331493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216331493 is an equidigital number, since it uses as much as digits as its factorization.

2216331493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 2216331493 is about 47077.9299990983. The cubic root of 2216331493 is about 1303.8017887612.

The spelling of 2216331493 in words is "two billion, two hundred sixteen million, three hundred thirty-one thousand, four hundred ninety-three".