216310104 has 24 divisors (see below), whose sum is σ = 585840060. Its totient is φ = 72103344.

The previous prime is 216310093. The next prime is 216310109. The reversal of 216310104 is 401013612.

Added to its reverse (401013612) it gives a square (617323716 = 24846²).

It is a happy number.

216310104 is a `hidden beast` number, since 21 + 631 + 0 + 10 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×216310104² = 93580122184981632, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216310109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1502082 + ... + 1502225.

Almost surely, 2^216310104 is an apocalyptic number.

216310104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216310104 is an abundant number, since it is smaller than the sum of its proper divisors (369529956).

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

216310104 is a wasteful number, since it uses less digits than its factorization.

216310104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004319 (or 3004312 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 216310104 is about 14707.4846251832. The cubic root of 216310104 is about 600.2869960336.

Adding to 216310104 its reverse (401013612), we get a palindrome (617323716).

The spelling of 216310104 in words is "two hundred sixteen million, three hundred ten thousand, one hundred four".