216424125 has 24 divisors (see below), whose sum is σ = 390142584. Its totient is φ = 115425600.

The previous prime is 216424099. The next prime is 216424133. The reversal of 216424125 is 521424612.

216424125 is a `hidden beast` number, since 2 + 1 + 642 + 4 + 12 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4372281 + 212051844 = 2091^2 + 14562^2 .

It is not a de Polignac number, because 216424125 - 2²⁰ = 215375549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95064 + ... + 97313.

It is an arithmetic number, because the mean of its divisors is an integer number (16255941).

Almost surely, 2^216424125 is an apocalyptic number.

216424125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216424125 is a deficient number, since it is larger than the sum of its proper divisors (173718459).

216424125 is a wasteful number, since it uses less digits than its factorization.

216424125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192398 (or 192385 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 216424125 is about 14711.3604061623. The cubic root of 216424125 is about 600.3924515803.

Adding to 216424125 its reverse (521424612), we get a palindrome (737848737).

The spelling of 216424125 in words is "two hundred sixteen million, four hundred twenty-four thousand, one hundred twenty-five".