215353213 has 2 divisors, whose sum is σ = 215353214. Its totient is φ = 215353212.

The previous prime is 215353207. The next prime is 215353247. The reversal of 215353213 is 312353512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215120889 + 232324 = 14667^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 215353213 - 2⁵ = 215353181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215353273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107676606 + 107676607.

It is an arithmetic number, because the mean of its divisors is an integer number (107676607).

Almost surely, 2^215353213 is an apocalyptic number.

It is an amenable number.

215353213 is a deficient number, since it is larger than the sum of its proper divisors (1).

215353213 is an equidigital number, since it uses as much as digits as its factorization.

215353213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 215353213 is about 14674.9178191907. The cubic root of 215353213 is about 599.4005243960.

The spelling of 215353213 in words is "two hundred fifteen million, three hundred fifty-three thousand, two hundred thirteen".