213102139 has 2 divisors, whose sum is σ = 213102140. Its totient is φ = 213102138.

The previous prime is 213102079. The next prime is 213102161. The reversal of 213102139 is 931201312.

It is an a-pointer prime, because the next prime (213102161) can be obtained adding 213102139 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213102139 - 2⁹ = 213101627 is a prime.

It is not a weakly prime, because it can be changed into another prime (213102839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106551069 + 106551070.

It is an arithmetic number, because the mean of its divisors is an integer number (106551070).

Almost surely, 2^213102139 is an apocalyptic number.

213102139 is a deficient number, since it is larger than the sum of its proper divisors (1).

213102139 is an equidigital number, since it uses as much as digits as its factorization.

213102139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 213102139 is about 14598.0183244165. The cubic root of 213102139 is about 597.3047058157.

The spelling of 213102139 in words is "two hundred thirteen million, one hundred two thousand, one hundred thirty-nine".