216331258 has 16 divisors (see below), whose sum is σ = 381227616. Its totient is φ = 90768240.

The previous prime is 216331223. The next prime is 216331259. The reversal of 216331258 is 852133612.

It is not an unprimeable number, because it can be changed into a prime (216331259) 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, 377916 + ... + 378487.

It is an arithmetic number, because the mean of its divisors is an integer number (23826726).

Almost surely, 2^216331258 is an apocalyptic number.

216331258 is a deficient number, since it is larger than the sum of its proper divisors (164896358).

216331258 is a wasteful number, since it uses less digits than its factorization.

216331258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756429.

The product of its digits is 8640, while the sum is 31.

The square root of 216331258 is about 14708.2037652461. The cubic root of 216331258 is about 600.3065637082.

The spelling of 216331258 in words is "two hundred sixteen million, three hundred thirty-one thousand, two hundred fifty-eight".