216134372 has 6 divisors (see below), whose sum is σ = 378235158. Its totient is φ = 108067184.

The previous prime is 216134363. The next prime is 216134389. The reversal of 216134372 is 273431612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 136282276 + 79852096 = 11674^2 + 8936^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27016793 + ... + 27016800.

It is an arithmetic number, because the mean of its divisors is an integer number (63039193).

Almost surely, 2^216134372 is an apocalyptic number.

It is an amenable number.

216134372 is a deficient number, since it is larger than the sum of its proper divisors (162100786).

216134372 is a wasteful number, since it uses less digits than its factorization.

216134372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54033597 (or 54033595 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 216134372 is about 14701.5091742311. The cubic root of 216134372 is about 600.1243927275.

Adding to 216134372 its reverse (273431612), we get a palindrome (489565984).

The spelling of 216134372 in words is "two hundred sixteen million, one hundred thirty-four thousand, three hundred seventy-two".