216197783 has 2 divisors, whose sum is σ = 216197784. Its totient is φ = 216197782.

The previous prime is 216197777. The next prime is 216197833. The reversal of 216197783 is 387791612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216197783 - 2¹⁶ = 216132247 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216197743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108098891 + 108098892.

It is an arithmetic number, because the mean of its divisors is an integer number (108098892).

Almost surely, 2^216197783 is an apocalyptic number.

216197783 is a deficient number, since it is larger than the sum of its proper divisors (1).

216197783 is an equidigital number, since it uses as much as digits as its factorization.

216197783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 216197783 is about 14703.6656313995. The cubic root of 216197783 is about 600.1830765400.

The spelling of 216197783 in words is "two hundred sixteen million, one hundred ninety-seven thousand, seven hundred eighty-three".