216239998 has 16 divisors (see below), whose sum is σ = 355039776. Its totient is φ = 98166240.

The previous prime is 216239987. The next prime is 216239999. The reversal of 216239998 is 899932612.

It is a super-3 number, since 3×216239998³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216239999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66586 + ... + 69757.

It is an arithmetic number, because the mean of its divisors is an integer number (22189986).

Almost surely, 2^216239998 is an apocalyptic number.

216239998 is a deficient number, since it is larger than the sum of its proper divisors (138799778).

216239998 is a wasteful number, since it uses less digits than its factorization.

216239998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136419.

The product of its digits is 419904, while the sum is 49.

The square root of 216239998 is about 14705.1010877178. The cubic root of 216239998 is about 600.2221381180. Note that the first 3 decimals are identical.

The spelling of 216239998 in words is "two hundred sixteen million, two hundred thirty-nine thousand, nine hundred ninety-eight".