216256367 has 2 divisors, whose sum is σ = 216256368. Its totient is φ = 216256366.

The previous prime is 216256321. The next prime is 216256399. The reversal of 216256367 is 763652612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216256367 - 2⁸ = 216256111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216256367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216256267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108128183 + 108128184.

It is an arithmetic number, because the mean of its divisors is an integer number (108128184).

Almost surely, 2^216256367 is an apocalyptic number.

216256367 is a deficient number, since it is larger than the sum of its proper divisors (1).

216256367 is an equidigital number, since it uses as much as digits as its factorization.

216256367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 216256367 is about 14705.6576527539. The cubic root of 216256367 is about 600.2372830008.

The spelling of 216256367 in words is "two hundred sixteen million, two hundred fifty-six thousand, three hundred sixty-seven".