216365258 has 16 divisors (see below), whose sum is σ = 329909760. Its totient is φ = 106402800.

The previous prime is 216365249. The next prime is 216365287. The reversal of 216365258 is 852563612.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66428 + ... + 69608.

It is an arithmetic number, because the mean of its divisors is an integer number (20619360).

Almost surely, 2^216365258 is an apocalyptic number.

216365258 is a deficient number, since it is larger than the sum of its proper divisors (113544502).

216365258 is a wasteful number, since it uses less digits than its factorization.

216365258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733.

The product of its digits is 86400, while the sum is 38.

The square root of 216365258 is about 14709.3595373830. The cubic root of 216365258 is about 600.3380113966.

The spelling of 216365258 in words is "two hundred sixteen million, three hundred sixty-five thousand, two hundred fifty-eight".