215222663 has 2 divisors, whose sum is σ = 215222664. Its totient is φ = 215222662.

The previous prime is 215222647. The next prime is 215222699. The reversal of 215222663 is 366222512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215222663 - 2⁴ = 215222647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215222563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107611331 + 107611332.

It is an arithmetic number, because the mean of its divisors is an integer number (107611332).

Almost surely, 2^215222663 is an apocalyptic number.

215222663 is a deficient number, since it is larger than the sum of its proper divisors (1).

215222663 is an equidigital number, since it uses as much as digits as its factorization.

215222663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 215222663 is about 14670.4690790717. The cubic root of 215222663 is about 599.2793783725.

The spelling of 215222663 in words is "two hundred fifteen million, two hundred twenty-two thousand, six hundred sixty-three".