213215393 has 2 divisors, whose sum is σ = 213215394. Its totient is φ = 213215392.

The previous prime is 213215389. The next prime is 213215417. The reversal of 213215393 is 393512312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154952704 + 58262689 = 12448^2 + 7633^2 .

It is a cyclic number.

It is not a de Polignac number, because 213215393 - 2² = 213215389 is a prime.

It is not a weakly prime, because it can be changed into another prime (213215323) 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, 106607696 + 106607697.

It is an arithmetic number, because the mean of its divisors is an integer number (106607697).

Almost surely, 2^213215393 is an apocalyptic number.

It is an amenable number.

213215393 is a deficient number, since it is larger than the sum of its proper divisors (1).

213215393 is an equidigital number, since it uses as much as digits as its factorization.

213215393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 213215393 is about 14601.8968973213. The cubic root of 213215393 is about 597.4105004161.

The spelling of 213215393 in words is "two hundred thirteen million, two hundred fifteen thousand, three hundred ninety-three".