212161471 has 2 divisors, whose sum is σ = 212161472. Its totient is φ = 212161470.

The previous prime is 212161459. The next prime is 212161507. The reversal of 212161471 is 174161212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212161471 is a prime.

It is a super-3 number, since 3×212161471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212161451) 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, 106080735 + 106080736.

It is an arithmetic number, because the mean of its divisors is an integer number (106080736).

Almost surely, 2^212161471 is an apocalyptic number.

212161471 is a deficient number, since it is larger than the sum of its proper divisors (1).

212161471 is an equidigital number, since it uses as much as digits as its factorization.

212161471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 212161471 is about 14565.7636600351. The cubic root of 212161471 is about 596.4245423078.

The spelling of 212161471 in words is "two hundred twelve million, one hundred sixty-one thousand, four hundred seventy-one".