212231473 has 2 divisors, whose sum is σ = 212231474. Its totient is φ = 212231472.

The previous prime is 212231471. The next prime is 212231489. The reversal of 212231473 is 374132212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159567424 + 52664049 = 12632^2 + 7257^2 .

It is a cyclic number.

It is not a de Polignac number, because 212231473 - 2¹ = 212231471 is a prime.

Together with 212231471, it forms a pair of twin primes.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (212231471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106115736 + 106115737.

It is an arithmetic number, because the mean of its divisors is an integer number (106115737).

Almost surely, 2^212231473 is an apocalyptic number.

It is an amenable number.

212231473 is a deficient number, since it is larger than the sum of its proper divisors (1).

212231473 is an equidigital number, since it uses as much as digits as its factorization.

212231473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 212231473 is about 14568.1664254634. The cubic root of 212231473 is about 596.4901312192.

Adding to 212231473 its reverse (374132212), we get a palindrome (586363685).

The spelling of 212231473 in words is "two hundred twelve million, two hundred thirty-one thousand, four hundred seventy-three".