212476321 has 2 divisors, whose sum is σ = 212476322. Its totient is φ = 212476320.

The previous prime is 212476291. The next prime is 212476337. The reversal of 212476321 is 123674212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169390225 + 43086096 = 13015^2 + 6564^2 .

It is a cyclic number.

It is not a de Polignac number, because 212476321 - 2⁵ = 212476289 is a prime.

It is equal to p_11730646 and since 212476321 and 11730646 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212476321.

It is not a weakly prime, because it can be changed into another prime (212476361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106238160 + 106238161.

It is an arithmetic number, because the mean of its divisors is an integer number (106238161).

Almost surely, 2^212476321 is an apocalyptic number.

It is an amenable number.

212476321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212476321 is an equidigital number, since it uses as much as digits as its factorization.

212476321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 212476321 is about 14576.5675314870. The cubic root of 212476321 is about 596.7194300513.

The spelling of 212476321 in words is "two hundred twelve million, four hundred seventy-six thousand, three hundred twenty-one".