213063817 has 2 divisors, whose sum is σ = 213063818. Its totient is φ = 213063816.

The previous prime is 213063811. The next prime is 213063863. The reversal of 213063817 is 718360312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163558521 + 49505296 = 12789^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 213063817 - 2²³ = 204675209 is a prime.

It is a super-2 number, since 2×213063817² = 90792380229218978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213063811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106531908 + 106531909.

It is an arithmetic number, because the mean of its divisors is an integer number (106531909).

Almost surely, 2^213063817 is an apocalyptic number.

It is an amenable number.

213063817 is a deficient number, since it is larger than the sum of its proper divisors (1).

213063817 is an equidigital number, since it uses as much as digits as its factorization.

213063817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 213063817 is about 14596.7056899836. The cubic root of 213063817 is about 597.2688993815.

The spelling of 213063817 in words is "two hundred thirteen million, sixty-three thousand, eight hundred seventeen".