211478471 has 2 divisors, whose sum is σ = 211478472. Its totient is φ = 211478470.

The previous prime is 211478459. The next prime is 211478473. The reversal of 211478471 is 174874112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211478471 - 2²⁶ = 144369607 is a prime.

It is a super-3 number, since 3×211478471³ (a number of 26 digits) contains 333 as substring.

Together with 211478473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211478473) 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, 105739235 + 105739236.

It is an arithmetic number, because the mean of its divisors is an integer number (105739236).

Almost surely, 2^211478471 is an apocalyptic number.

211478471 is a deficient number, since it is larger than the sum of its proper divisors (1).

211478471 is an equidigital number, since it uses as much as digits as its factorization.

211478471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 35.

The square root of 211478471 is about 14542.2993711449. The cubic root of 211478471 is about 595.7838418192.

The spelling of 211478471 in words is "two hundred eleven million, four hundred seventy-eight thousand, four hundred seventy-one".