216203907 has 32 divisors (see below), whose sum is σ = 314668800. Its totient is φ = 131594112.

The previous prime is 216203899. The next prime is 216203927. The reversal of 216203907 is 709302612.

It is not a de Polignac number, because 216203907 - 2³ = 216203899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216203927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177633 + ... + 178845.

It is an arithmetic number, because the mean of its divisors is an integer number (9833400).

Almost surely, 2^216203907 is an apocalyptic number.

216203907 is a deficient number, since it is larger than the sum of its proper divisors (98464893).

216203907 is a wasteful number, since it uses less digits than its factorization.

216203907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 216203907 is about 14703.8738773155. The cubic root of 216203907 is about 600.1887433981.

The spelling of 216203907 in words is "two hundred sixteen million, two hundred three thousand, nine hundred seven".