216394293127 has 2 divisors, whose sum is σ = 216394293128. Its totient is φ = 216394293126.

The previous prime is 216394293091. The next prime is 216394293131. The reversal of 216394293127 is 721392493612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216394293127 - 2¹⁹ = 216393768839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216394293527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108197146563 + 108197146564.

It is an arithmetic number, because the mean of its divisors is an integer number (108197146564).

Almost surely, 2^216394293127 is an apocalyptic number.

216394293127 is a deficient number, since it is larger than the sum of its proper divisors (1).

216394293127 is an equidigital number, since it uses as much as digits as its factorization.

216394293127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The spelling of 216394293127 in words is "two hundred sixteen billion, three hundred ninety-four million, two hundred ninety-three thousand, one hundred twenty-seven".