216375826 has 4 divisors (see below), whose sum is σ = 324563742. Its totient is φ = 108187912.

The previous prime is 216375811. The next prime is 216375829. The reversal of 216375826 is 628573612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 145226601 + 71149225 = 12051^2 + 8435^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (216375829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54093955 + ... + 54093958.

Almost surely, 2^216375826 is an apocalyptic number.

216375826 is a deficient number, since it is larger than the sum of its proper divisors (108187916).

216375826 is a wasteful number, since it uses less digits than its factorization.

216375826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108187915.

The product of its digits is 120960, while the sum is 40.

The square root of 216375826 is about 14709.7187600579. The cubic root of 216375826 is about 600.3477854069.

The spelling of 216375826 in words is "two hundred sixteen million, three hundred seventy-five thousand, eight hundred twenty-six".