216400226 has 8 divisors (see below), whose sum is σ = 370971840. Its totient is φ = 92742948.

The previous prime is 216400211. The next prime is 216400229. The reversal of 216400226 is 622004612.

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

It is not an unprimeable number, because it can be changed into a prime (216400229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7728566 + ... + 7728593.

It is an arithmetic number, because the mean of its divisors is an integer number (46371480).

Almost surely, 2^216400226 is an apocalyptic number.

216400226 is a deficient number, since it is larger than the sum of its proper divisors (154571614).

216400226 is a wasteful number, since it uses less digits than its factorization.

216400226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15457168.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 216400226 is about 14710.5481203115. The cubic root of 216400226 is about 600.3703509828.

Adding to 216400226 its reverse (622004612), we get a palindrome (838404838).

The spelling of 216400226 in words is "two hundred sixteen million, four hundred thousand, two hundred twenty-six".