211225471 has 2 divisors, whose sum is σ = 211225472. Its totient is φ = 211225470.

The previous prime is 211225457. The next prime is 211225477. The reversal of 211225471 is 174522112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211225471 - 2⁵ = 211225439 is a prime.

It is a super-3 number, since 3×211225471³ (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 (211225477) 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, 105612735 + 105612736.

It is an arithmetic number, because the mean of its divisors is an integer number (105612736).

Almost surely, 2^211225471 is an apocalyptic number.

211225471 is a deficient number, since it is larger than the sum of its proper divisors (1).

211225471 is an equidigital number, since it uses as much as digits as its factorization.

211225471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 211225471 is about 14533.5980059998. The cubic root of 211225471 is about 595.5461604757.

Adding to 211225471 its reverse (174522112), we get a palindrome (385747583).

The spelling of 211225471 in words is "two hundred eleven million, two hundred twenty-five thousand, four hundred seventy-one".