2188506139 has 2 divisors, whose sum is σ = 2188506140. Its totient is φ = 2188506138.

The previous prime is 2188506121. The next prime is 2188506161. The reversal of 2188506139 is 9316058812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2188506139 - 2⁷ = 2188506011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2188506095 and 2188506104.

It is not a weakly prime, because it can be changed into another prime (2188506119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094253069 + 1094253070.

It is an arithmetic number, because the mean of its divisors is an integer number (1094253070).

Almost surely, 2^2188506139 is an apocalyptic number.

2188506139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188506139 is an equidigital number, since it uses as much as digits as its factorization.

2188506139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 2188506139 is about 46781.4721764931. The cubic root of 2188506139 is about 1298.3225186074.

The spelling of 2188506139 in words is "two billion, one hundred eighty-eight million, five hundred six thousand, one hundred thirty-nine".