216032240 has 40 divisors (see below), whose sum is σ = 511761888. Its totient is φ = 84780800.

The previous prime is 216032221. The next prime is 216032249. The reversal of 216032240 is 42230612.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216032249) 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, 21236 + ... + 29715.

Almost surely, 2^216032240 is an apocalyptic number.

216032240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216032240 is an abundant number, since it is smaller than the sum of its proper divisors (295729648).

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

216032240 is a wasteful number, since it uses less digits than its factorization.

216032240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51017 (or 51011 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 216032240 is about 14698.0352428479. The cubic root of 216032240 is about 600.0298503668.

Adding to 216032240 its reverse (42230612), we get a palindrome (258262852).

The spelling of 216032240 in words is "two hundred sixteen million, thirty-two thousand, two hundred forty".