216012187 has 8 divisors (see below), whose sum is σ = 217226240. Its totient is φ = 214802280.

The previous prime is 216012169. The next prime is 216012193. The reversal of 216012187 is 781210612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216012187 - 2¹⁵ = 215979419 is a prime.

It is a super-2 number, since 2×216012187² = 93322529865045938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216012107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174862 + ... + 176092.

It is an arithmetic number, because the mean of its divisors is an integer number (27153280).

Almost surely, 2^216012187 is an apocalyptic number.

216012187 is a deficient number, since it is larger than the sum of its proper divisors (1214053).

216012187 is a wasteful number, since it uses less digits than its factorization.

216012187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 216012187 is about 14697.3530610107. The cubic root of 216012187 is about 600.0112840470.

Adding to 216012187 its reverse (781210612), we get a palindrome (997222799).

The spelling of 216012187 in words is "two hundred sixteen million, twelve thousand, one hundred eighty-seven".