213212933 has 2 divisors, whose sum is σ = 213212934. Its totient is φ = 213212932.

The previous prime is 213212917. The next prime is 213212953. The reversal of 213212933 is 339212312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140588449 + 72624484 = 11857^2 + 8522^2 .

It is a cyclic number.

It is not a de Polignac number, because 213212933 - 2⁴ = 213212917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213212953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106606466 + 106606467.

It is an arithmetic number, because the mean of its divisors is an integer number (106606467).

Almost surely, 2^213212933 is an apocalyptic number.

It is an amenable number.

213212933 is a deficient number, since it is larger than the sum of its proper divisors (1).

213212933 is an equidigital number, since it uses as much as digits as its factorization.

213212933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 213212933 is about 14601.8126614472. The cubic root of 213212933 is about 597.4082028404.

The spelling of 213212933 in words is "two hundred thirteen million, two hundred twelve thousand, nine hundred thirty-three".