216441136 has 20 divisors (see below), whose sum is σ = 421102264. Its totient is φ = 107769600.

The previous prime is 216441133. The next prime is 216441139. The reversal of 216441136 is 631144612.

It is an interprime number because it is at equal distance from previous prime (216441133) and next prime (216441139).

It is not an unprimeable number, because it can be changed into a prime (216441133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24210 + ... + 31921.

Almost surely, 2^216441136 is an apocalyptic number.

It is an amenable number.

216441136 is a deficient number, since it is larger than the sum of its proper divisors (204661128).

216441136 is a wasteful number, since it uses less digits than its factorization.

216441136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56380 (or 56374 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 216441136 is about 14711.9385534334. The cubic root of 216441136 is about 600.4081815094.

Adding to 216441136 its reverse (631144612), we get a palindrome (847585748).

The spelling of 216441136 in words is "two hundred sixteen million, four hundred forty-one thousand, one hundred thirty-six".