211162139 has 2 divisors, whose sum is σ = 211162140. Its totient is φ = 211162138.

The previous prime is 211162109. The next prime is 211162141. The reversal of 211162139 is 931261112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211162139 - 2¹⁶ = 211096603 is a prime.

Together with 211162141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211162109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105581069 + 105581070.

It is an arithmetic number, because the mean of its divisors is an integer number (105581070).

Almost surely, 2^211162139 is an apocalyptic number.

211162139 is a deficient number, since it is larger than the sum of its proper divisors (1).

211162139 is an equidigital number, since it uses as much as digits as its factorization.

211162139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 211162139 is about 14531.4190291244. The cubic root of 211162139 is about 595.4866334065.

The spelling of 211162139 in words is "two hundred eleven million, one hundred sixty-two thousand, one hundred thirty-nine".