216322427 has 2 divisors, whose sum is σ = 216322428. Its totient is φ = 216322426.

The previous prime is 216322411. The next prime is 216322451. The reversal of 216322427 is 724223612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216322427 - 2⁴ = 216322411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216322427.

It is not a weakly prime, because it can be changed into another prime (216322727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108161213 + 108161214.

It is an arithmetic number, because the mean of its divisors is an integer number (108161214).

Almost surely, 2^216322427 is an apocalyptic number.

216322427 is a deficient number, since it is larger than the sum of its proper divisors (1).

216322427 is an equidigital number, since it uses as much as digits as its factorization.

216322427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 216322427 is about 14707.9035555717. The cubic root of 216322427 is about 600.2983950945.

The spelling of 216322427 in words is "two hundred sixteen million, three hundred twenty-two thousand, four hundred twenty-seven".