2188651139 has 2 divisors, whose sum is σ = 2188651140. Its totient is φ = 2188651138.

The previous prime is 2188651123. The next prime is 2188651151. The reversal of 2188651139 is 9311568812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2188651139 - 2⁴ = 2188651123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2188651139.

It is not a weakly prime, because it can be changed into another prime (2188651939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094325569 + 1094325570.

It is an arithmetic number, because the mean of its divisors is an integer number (1094325570).

Almost surely, 2^2188651139 is an apocalyptic number.

2188651139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188651139 is an equidigital number, since it uses as much as digits as its factorization.

2188651139 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 2188651139 is about 46783.0219096629. The cubic root of 2188651139 is about 1298.3511915309.

The spelling of 2188651139 in words is "two billion, one hundred eighty-eight million, six hundred fifty-one thousand, one hundred thirty-nine".