216423523226 has 8 divisors (see below), whose sum is σ = 324669561120. Its totient is φ = 108200336188.

The previous prime is 216423523189. The next prime is 216423523273. The reversal of 216423523226 is 622325324612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216423523226² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216423523226.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5689016 + ... + 5726931.

It is an arithmetic number, because the mean of its divisors is an integer number (40583695140).

Almost surely, 2^216423523226 is an apocalyptic number.

216423523226 is a deficient number, since it is larger than the sum of its proper divisors (108246037894).

216423523226 is a wasteful number, since it uses less digits than its factorization.

216423523226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11425428.

The product of its digits is 207360, while the sum is 38.

Adding to 216423523226 its reverse (622325324612), we get a palindrome (838748847838).

The spelling of 216423523226 in words is "two hundred sixteen billion, four hundred twenty-three million, five hundred twenty-three thousand, two hundred twenty-six".