216612156 has 24 divisors (see below), whose sum is σ = 517183744. Its totient is φ = 70524720.

The previous prime is 216612133. The next prime is 216612169. The reversal of 216612156 is 651216612.

It is a super-2 number, since 2×216612156² = 93841652253936672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209380 + ... + 210411.

Almost surely, 2^216612156 is an apocalyptic number.

It is an amenable number.

216612156 is an abundant number, since it is smaller than the sum of its proper divisors (300571588).

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

216612156 is a wasteful number, since it uses less digits than its factorization.

216612156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419841 (or 419839 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 216612156 is about 14717.7496921235. The cubic root of 216612156 is about 600.5662764945.

Adding to 216612156 its reverse (651216612), we get a palindrome (867828768).

The spelling of 216612156 in words is "two hundred sixteen million, six hundred twelve thousand, one hundred fifty-six".