216907232 has 12 divisors (see below), whose sum is σ = 427036176. Its totient is φ = 108453600.

The previous prime is 216907231. The next prime is 216907241. The reversal of 216907232 is 232709612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 6778351 = 216907232 / (2 + 1 + 6 + 9 + 0 + 7 + 2 + 3 + 2).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216907231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389144 + ... + 3389207.

It is an arithmetic number, because the mean of its divisors is an integer number (35586348).

Almost surely, 2^216907232 is an apocalyptic number.

It is an amenable number.

216907232 is a deficient number, since it is larger than the sum of its proper divisors (210128944).

216907232 is an equidigital number, since it uses as much as digits as its factorization.

216907232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6778361 (or 6778353 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 216907232 is about 14727.7707749679. The cubic root of 216907232 is about 600.8388562833.

The spelling of 216907232 in words is "two hundred sixteen million, nine hundred seven thousand, two hundred thirty-two".