216740032 has 14 divisors (see below), whose sum is σ = 430093628. Its totient is φ = 108369984.

The previous prime is 216739967. The next prime is 216740033. The reversal of 216740032 is 230047612.

It is a super-2 number, since 2×216740032² = 93952482942722048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216739979 and 216740006.

It is not an unprimeable number, because it can be changed into a prime (216740033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1693218 + ... + 1693345.

Almost surely, 2^216740032 is an apocalyptic number.

It is an amenable number.

216740032 is a deficient number, since it is larger than the sum of its proper divisors (213353596).

216740032 is an equidigital number, since it uses as much as digits as its factorization.

216740032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386575 (or 3386565 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 216740032 is about 14722.0933294148. The cubic root of 216740032 is about 600.6844337686.

Adding to 216740032 its reverse (230047612), we get a palindrome (446787644).

The spelling of 216740032 in words is "two hundred sixteen million, seven hundred forty thousand, thirty-two".