216258956 has 12 divisors (see below), whose sum is σ = 378731640. Its totient is φ = 108049920.

The previous prime is 216258947. The next prime is 216258961. The reversal of 216258956 is 659852612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13550 + ... + 24821.

It is an arithmetic number, because the mean of its divisors is an integer number (31560970).

Almost surely, 2^216258956 is an apocalyptic number.

It is an amenable number.

216258956 is a deficient number, since it is larger than the sum of its proper divisors (162472684).

216258956 is a wasteful number, since it uses less digits than its factorization.

216258956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39784 (or 39782 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 216258956 is about 14705.7456798355. The cubic root of 216258956 is about 600.2396783185.

The spelling of 216258956 in words is "two hundred sixteen million, two hundred fifty-eight thousand, nine hundred fifty-six".