2188651193 has 2 divisors, whose sum is σ = 2188651194. Its totient is φ = 2188651192.

The previous prime is 2188651163. The next prime is 2188651207. The reversal of 2188651193 is 3911568812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1790728489 + 397922704 = 42317^2 + 19948^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188651193 - 2²⁶ = 2121542329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2188651123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094325596 + 1094325597.

It is an arithmetic number, because the mean of its divisors is an integer number (1094325597).

Almost surely, 2^2188651193 is an apocalyptic number.

It is an amenable number.

2188651193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188651193 is an equidigital number, since it uses as much as digits as its factorization.

2188651193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 2188651193 is about 46783.0224867954. The cubic root of 2188651193 is about 1298.3512022089.

The spelling of 2188651193 in words is "two billion, one hundred eighty-eight million, six hundred fifty-one thousand, one hundred ninety-three".