216953827 has 2 divisors, whose sum is σ = 216953828. Its totient is φ = 216953826.

The previous prime is 216953773. The next prime is 216953831. The reversal of 216953827 is 728359612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216953827 - 2⁷ = 216953699 is a prime.

It is not a weakly prime, because it can be changed into another prime (216953897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108476913 + 108476914.

It is an arithmetic number, because the mean of its divisors is an integer number (108476914).

Almost surely, 2^216953827 is an apocalyptic number.

216953827 is a deficient number, since it is larger than the sum of its proper divisors (1).

216953827 is an equidigital number, since it uses as much as digits as its factorization.

216953827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 216953827 is about 14729.3525655407. The cubic root of 216953827 is about 600.8818763367.

The spelling of 216953827 in words is "two hundred sixteen million, nine hundred fifty-three thousand, eight hundred twenty-seven".