216031838 has 16 divisors (see below), whose sum is σ = 356209920. Its totient is φ = 97445400.

The previous prime is 216031831. The next prime is 216031859. The reversal of 216031838 is 838130612.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216031831) 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, 34598 + ... + 40361.

It is an arithmetic number, because the mean of its divisors is an integer number (22263120).

Almost surely, 2^216031838 is an apocalyptic number.

216031838 is a deficient number, since it is larger than the sum of its proper divisors (140178082).

216031838 is a wasteful number, since it uses less digits than its factorization.

216031838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75103.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 216031838 is about 14698.0215675444. The cubic root of 216031838 is about 600.0294781813.

The spelling of 216031838 in words is "two hundred sixteen million, thirty-one thousand, eight hundred thirty-eight".