216332631 has 6 divisors (see below), whose sum is σ = 312480480. Its totient is φ = 144221748.

The previous prime is 216332629. The next prime is 216332647. The reversal of 216332631 is 136233612.

It is a happy number.

216332631 is a `hidden beast` number, since 2 + 1 + 633 + 26 + 3 + 1 = 666.

It is not a de Polignac number, because 216332631 - 2¹ = 216332629 is a prime.

It is a super-2 number, since 2×216332631² = 93599614470764322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216332595 and 216332604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216332621) 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 5 ways as a sum of consecutive naturals, for example, 12018471 + ... + 12018488.

It is an arithmetic number, because the mean of its divisors is an integer number (52080080).

Almost surely, 2^216332631 is an apocalyptic number.

216332631 is a deficient number, since it is larger than the sum of its proper divisors (96147849).

216332631 is a wasteful number, since it uses less digits than its factorization.

216332631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24036965 (or 24036962 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 216332631 is about 14708.2504398042. The cubic root of 216332631 is about 600.3078337037.

The spelling of 216332631 in words is "two hundred sixteen million, three hundred thirty-two thousand, six hundred thirty-one".