216530104 has 16 divisors (see below), whose sum is σ = 463993200. Its totient is φ = 92798592.

The previous prime is 216530089. The next prime is 216530107. The reversal of 216530104 is 401035612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216530107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933249 + ... + 1933360.

It is an arithmetic number, because the mean of its divisors is an integer number (28999575).

Almost surely, 2^216530104 is an apocalyptic number.

It is an amenable number.

216530104 is an abundant number, since it is smaller than the sum of its proper divisors (247463096).

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

216530104 is a wasteful number, since it uses less digits than its factorization.

216530104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3866622 (or 3866618 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 216530104 is about 14714.9619095667. The cubic root of 216530104 is about 600.4904360486.

Adding to 216530104 its reverse (401035612), we get a palindrome (617565716).

The spelling of 216530104 in words is "two hundred sixteen million, five hundred thirty thousand, one hundred four".