216984125 has 16 divisors (see below), whose sum is σ = 271252800. Its totient is φ = 173294800.

The previous prime is 216984083. The next prime is 216984127. The reversal of 216984125 is 521489612.

It is not a de Polignac number, because 216984125 - 2¹⁰ = 216983101 is a prime.

It is a super-2 number, since 2×216984125² = 94164221004031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216984127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102326 + ... + 104424.

It is an arithmetic number, because the mean of its divisors is an integer number (16953300).

Almost surely, 2^216984125 is an apocalyptic number.

216984125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216984125 is a deficient number, since it is larger than the sum of its proper divisors (54268675).

216984125 is an equidigital number, since it uses as much as digits as its factorization.

216984125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 2931 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 216984125 is about 14730.3810201909. The cubic root of 216984125 is about 600.9098464535.

The spelling of 216984125 in words is "two hundred sixteen million, nine hundred eighty-four thousand, one hundred twenty-five".