213533393 has 2 divisors, whose sum is σ = 213533394. Its totient is φ = 213533392.

The previous prime is 213533389. The next prime is 213533407. The reversal of 213533393 is 393335312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138485824 + 75047569 = 11768^2 + 8663^2 .

It is a cyclic number.

It is not a de Polignac number, because 213533393 - 2² = 213533389 is a prime.

It is not a weakly prime, because it can be changed into another prime (213533693) 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, 106766696 + 106766697.

It is an arithmetic number, because the mean of its divisors is an integer number (106766697).

Almost surely, 2^213533393 is an apocalyptic number.

It is an amenable number.

213533393 is a deficient number, since it is larger than the sum of its proper divisors (1).

213533393 is an equidigital number, since it uses as much as digits as its factorization.

213533393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 32.

The square root of 213533393 is about 14612.7818364608. The cubic root of 213533393 is about 597.7073554224.

The spelling of 213533393 in words is "two hundred thirteen million, five hundred thirty-three thousand, three hundred ninety-three".