216617954 has 16 divisors (see below), whose sum is σ = 377434176. Its totient is φ = 91314000.

The previous prime is 216617939. The next prime is 216617957. The reversal of 216617954 is 459716612.

It is a super-2 number, since 2×216617954² = 93846675990292232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216617957) 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, 125972 + ... + 127679.

It is an arithmetic number, because the mean of its divisors is an integer number (23589636).

Almost surely, 2^216617954 is an apocalyptic number.

216617954 is a deficient number, since it is larger than the sum of its proper divisors (160816222).

216617954 is a wasteful number, since it uses less digits than its factorization.

216617954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253721.

The product of its digits is 90720, while the sum is 41.

The square root of 216617954 is about 14717.9466638523. The cubic root of 216617954 is about 600.5716348460.

The spelling of 216617954 in words is "two hundred sixteen million, six hundred seventeen thousand, nine hundred fifty-four".