212220773 has 2 divisors, whose sum is σ = 212220774. Its totient is φ = 212220772.

The previous prime is 212220739. The next prime is 212220787. The reversal of 212220773 is 377022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183683809 + 28536964 = 13553^2 + 5342^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220773 - 2²⁰ = 211172197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110386 + 106110387.

It is an arithmetic number, because the mean of its divisors is an integer number (106110387).

Almost surely, 2^212220773 is an apocalyptic number.

It is an amenable number.

212220773 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220773 is an equidigital number, since it uses as much as digits as its factorization.

212220773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 212220773 is about 14567.7991817570. The cubic root of 212220773 is about 596.4801067059.

Adding to 212220773 its reverse (377022212), we get a palindrome (589242985).

The spelling of 212220773 in words is "two hundred twelve million, two hundred twenty thousand, seven hundred seventy-three".