216326403 has 16 divisors (see below), whose sum is σ = 321069600. Its totient is φ = 143953920.

The previous prime is 216326389. The next prime is 216326437. The reversal of 216326403 is 304623612.

216326403 is a `hidden beast` number, since 2 + 16 + 3 + 2 + 640 + 3 = 666.

It is not a de Polignac number, because 216326403 - 2⁸ = 216326147 is a prime.

It is a super-2 number, since 2×216326403² = 93594225269836818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (216326483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8323 + ... + 22403.

It is an arithmetic number, because the mean of its divisors is an integer number (20066850).

Almost surely, 2^216326403 is an apocalyptic number.

216326403 is a deficient number, since it is larger than the sum of its proper divisors (104743197).

216326403 is a wasteful number, since it uses less digits than its factorization.

216326403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14659 (or 14653 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 216326403 is about 14708.0387203733. The cubic root of 216326403 is about 600.3020728944.

The spelling of 216326403 in words is "two hundred sixteen million, three hundred twenty-six thousand, four hundred three".