213533669 has 2 divisors, whose sum is σ = 213533670. Its totient is φ = 213533668.

The previous prime is 213533629. The next prime is 213533681. The reversal of 213533669 is 966335312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117983044 + 95550625 = 10862^2 + 9775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213533669 is a prime.

It is a super-2 number, since 2×213533669² = 91193255593203122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_11785817 and since 213533669 and 11785817 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213533629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106766834 + 106766835.

It is an arithmetic number, because the mean of its divisors is an integer number (106766835).

Almost surely, 2^213533669 is an apocalyptic number.

It is an amenable number.

213533669 is a deficient number, since it is larger than the sum of its proper divisors (1).

213533669 is an equidigital number, since it uses as much as digits as its factorization.

213533669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 38.

The square root of 213533669 is about 14612.7912802449. The cubic root of 213533669 is about 597.7076129421.

The spelling of 213533669 in words is "two hundred thirteen million, five hundred thirty-three thousand, six hundred sixty-nine".