216988258 has 8 divisors (see below), whose sum is σ = 325566252. Its totient is φ = 108466176.

The previous prime is 216988231. The next prime is 216988259. The reversal of 216988258 is 852889612.

It can be written as a sum of positive squares in 2 ways, for example, as 176703849 + 40284409 = 13293^2 + 6347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216988259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2335 + ... + 20962.

Almost surely, 2^216988258 is an apocalyptic number.

216988258 is a deficient number, since it is larger than the sum of its proper divisors (108577994).

216988258 is a wasteful number, since it uses less digits than its factorization.

216988258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27956.

The product of its digits is 552960, while the sum is 49.

The square root of 216988258 is about 14730.5213078153. The cubic root of 216988258 is about 600.9136617013.

The spelling of 216988258 in words is "two hundred sixteen million, nine hundred eighty-eight thousand, two hundred fifty-eight".