211842047 has 2 divisors, whose sum is σ = 211842048. Its totient is φ = 211842046.

The previous prime is 211842031. The next prime is 211842079. The reversal of 211842047 is 740248112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211842047 - 2⁴ = 211842031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211842347) 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, 105921023 + 105921024.

It is an arithmetic number, because the mean of its divisors is an integer number (105921024).

Almost surely, 2^211842047 is an apocalyptic number.

211842047 is a deficient number, since it is larger than the sum of its proper divisors (1).

211842047 is an equidigital number, since it uses as much as digits as its factorization.

211842047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 211842047 is about 14554.7946395681. The cubic root of 211842047 is about 596.1250722830.

The spelling of 211842047 in words is "two hundred eleven million, eight hundred forty-two thousand, forty-seven".