216240022 has 4 divisors (see below), whose sum is σ = 324360036. Its totient is φ = 108120010.

The previous prime is 216239999. The next prime is 216240023. The reversal of 216240022 is 220042612.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×216240022³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216240023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54060004 + ... + 54060007.

It is an arithmetic number, because the mean of its divisors is an integer number (81090009).

Almost surely, 2^216240022 is an apocalyptic number.

216240022 is a deficient number, since it is larger than the sum of its proper divisors (108120014).

216240022 is a wasteful number, since it uses less digits than its factorization.

216240022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108120013.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 216240022 is about 14705.1019037612. The cubic root of 216240022 is about 600.2221603238. Note that the first 3 decimals are identical.

Adding to 216240022 its reverse (220042612), we get a palindrome (436282634).

The spelling of 216240022 in words is "two hundred sixteen million, two hundred forty thousand, twenty-two".