216131230 has 32 divisors (see below), whose sum is σ = 463947264. Its totient is φ = 70879776.

The previous prime is 216131221. The next prime is 216131273. The reversal of 216131230 is 32131612.

It is a junction number, because it is equal to n+sod(n) for n = 216131198 and 216131207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65512 + ... + 68731.

It is an arithmetic number, because the mean of its divisors is an integer number (14498352).

Almost surely, 2^216131230 is an apocalyptic number.

216131230 is an abundant number, since it is smaller than the sum of its proper divisors (247816034).

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

216131230 is a wasteful number, since it uses less digits than its factorization.

216131230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134280.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 216131230 is about 14701.4023140651. The cubic root of 216131230 is about 600.1214846601.

Adding to 216131230 its reverse (32131612), we get a palindrome (248262842).

The spelling of 216131230 in words is "two hundred sixteen million, one hundred thirty-one thousand, two hundred thirty".