216426233 has 2 divisors, whose sum is σ = 216426234. Its totient is φ = 216426232.

The previous prime is 216426193. The next prime is 216426253. The reversal of 216426233 is 332624612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144312169 + 72114064 = 12013^2 + 8492^2 .

It is a cyclic number.

It is not a de Polignac number, because 216426233 - 2¹⁸ = 216164089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216426196 and 216426205.

It is not a weakly prime, because it can be changed into another prime (216426253) 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, 108213116 + 108213117.

It is an arithmetic number, because the mean of its divisors is an integer number (108213117).

Almost surely, 2^216426233 is an apocalyptic number.

It is an amenable number.

216426233 is a deficient number, since it is larger than the sum of its proper divisors (1).

216426233 is an equidigital number, since it uses as much as digits as its factorization.

216426233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 216426233 is about 14711.4320512994. The cubic root of 216426233 is about 600.3944008750.

The spelling of 216426233 in words is "two hundred sixteen million, four hundred twenty-six thousand, two hundred thirty-three".