216424134 has 24 divisors (see below), whose sum is σ = 474857760. Its totient is φ = 71227728.

The previous prime is 216424133. The next prime is 216424141. The reversal of 216424134 is 431424612.

It is a happy number.

216424134 is a `hidden beast` number, since 2 + 1 + 642 + 4 + 13 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 216424098 and 216424107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216424133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74677 + ... + 77520.

It is an arithmetic number, because the mean of its divisors is an integer number (19785740).

Almost surely, 2^216424134 is an apocalyptic number.

216424134 is an abundant number, since it is smaller than the sum of its proper divisors (258433626).

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

216424134 is a wasteful number, since it uses less digits than its factorization.

216424134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152284 (or 152281 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 216424134 is about 14711.3607120484. The cubic root of 216424134 is about 600.3924599027.

Adding to 216424134 its reverse (431424612), we get a palindrome (647848746).

The spelling of 216424134 in words is "two hundred sixteen million, four hundred twenty-four thousand, one hundred thirty-four".