216403230 has 16 divisors (see below), whose sum is σ = 519367824. Its totient is φ = 57707520.

The previous prime is 216403211. The next prime is 216403247. The reversal of 216403230 is 32304612.

It is a happy number.

216403230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216403197 and 216403206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606691 + ... + 3606750.

It is an arithmetic number, because the mean of its divisors is an integer number (32460489).

Almost surely, 2^216403230 is an apocalyptic number.

216403230 is an abundant number, since it is smaller than the sum of its proper divisors (302964594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216403230 is a wasteful number, since it uses less digits than its factorization.

216403230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213451.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 216403230 is about 14710.6502235625. The cubic root of 216403230 is about 600.3731290209.

Adding to 216403230 its reverse (32304612), we get a palindrome (248707842).

The spelling of 216403230 in words is "two hundred sixteen million, four hundred three thousand, two hundred thirty".