216231030 has 24 divisors (see below), whose sum is σ = 562200912. Its totient is φ = 57661584.

The previous prime is 216231011. The next prime is 216231079. The reversal of 216231030 is 30132612.

216231030 is a `hidden beast` number, since 2 + 1 + 623 + 10 + 30 = 666.

It is a super-4 number, since 4×216231030⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 216230994 and 216231012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1201194 + ... + 1201373.

It is an arithmetic number, because the mean of its divisors is an integer number (23425038).

Almost surely, 2^216231030 is an apocalyptic number.

216231030 is an abundant number, since it is smaller than the sum of its proper divisors (345969882).

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

216231030 is a wasteful number, since it uses less digits than its factorization.

216231030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402580 (or 2402577 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 216231030 is about 14704.7961563566. The cubic root of 216231030 is about 600.2138404447.

Adding to 216231030 its reverse (30132612), we get a palindrome (246363642).

The spelling of 216231030 in words is "two hundred sixteen million, two hundred thirty-one thousand, thirty".