2193221231 has 2 divisors, whose sum is σ = 2193221232. Its totient is φ = 2193221230.

The previous prime is 2193221209. The next prime is 2193221273. The reversal of 2193221231 is 1321223912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2193221231 is a prime.

It is a super-2 number, since 2×2193221231² = 9620438736218310722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2193221231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193221431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096610615 + 1096610616.

It is an arithmetic number, because the mean of its divisors is an integer number (1096610616).

Almost surely, 2^2193221231 is an apocalyptic number.

2193221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193221231 is an equidigital number, since it uses as much as digits as its factorization.

2193221231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 2193221231 is about 46831.8399275536. The cubic root of 2193221231 is about 1299.2542529534.

The spelling of 2193221231 in words is "two billion, one hundred ninety-three million, two hundred twenty-one thousand, two hundred thirty-one".