216552943 has 2 divisors, whose sum is σ = 216552944. Its totient is φ = 216552942.

The previous prime is 216552877. The next prime is 216552977. The reversal of 216552943 is 349255612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216552943 - 2¹³ = 216544751 is a prime.

It is a super-2 number, since 2×216552943² = 93790354243922498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216553943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108276471 + 108276472.

It is an arithmetic number, because the mean of its divisors is an integer number (108276472).

Almost surely, 2^216552943 is an apocalyptic number.

216552943 is a deficient number, since it is larger than the sum of its proper divisors (1).

216552943 is an equidigital number, since it uses as much as digits as its factorization.

216552943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 216552943 is about 14715.7379359650. The cubic root of 216552943 is about 600.5115479997.

The spelling of 216552943 in words is "two hundred sixteen million, five hundred fifty-two thousand, nine hundred forty-three".