216683500372 has 12 divisors (see below), whose sum is σ = 379226741236. Its totient is φ = 108333002880.

The previous prime is 216683500361. The next prime is 216683500387. The reversal of 216683500372 is 273005386612.

It can be written as a sum of positive squares in 2 ways, for example, as 113060027536 + 103623472836 = 336244^2 + 321906^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130933 + ... + 2230300.

Almost surely, 2^216683500372 is an apocalyptic number.

It is an amenable number.

216683500372 is a deficient number, since it is larger than the sum of its proper divisors (162543240864).

216683500372 is a wasteful number, since it uses less digits than its factorization.

216683500372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373658 (or 4373656 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

Adding to 216683500372 its reverse (273005386612), we get a palindrome (489688886984).

The spelling of 216683500372 in words is "two hundred sixteen billion, six hundred eighty-three million, five hundred thousand, three hundred seventy-two".