216238031 has 8 divisors (see below), whose sum is σ = 227836800. Its totient is φ = 204661080.

The previous prime is 216238003. The next prime is 216238037. The reversal of 216238031 is 130832612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216238031 - 2¹⁴ = 216221647 is a prime.

It is a super-3 number, since 3×216238031³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

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 (216238037) 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 in 7 ways as a sum of consecutive naturals, for example, 17390 + ... + 27108.

It is an arithmetic number, because the mean of its divisors is an integer number (28479600).

Almost surely, 2^216238031 is an apocalyptic number.

216238031 is a deficient number, since it is larger than the sum of its proper divisors (11598769).

216238031 is a wasteful number, since it uses less digits than its factorization.

216238031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10909.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 216238031 is about 14705.0342060126. The cubic root of 216238031 is about 600.2203181640.

The spelling of 216238031 in words is "two hundred sixteen million, two hundred thirty-eight thousand, thirty-one".