216941761 has 8 divisors (see below), whose sum is σ = 222899040. Its totient is φ = 211060608.

The previous prime is 216941749. The next prime is 216941771. The reversal of 216941761 is 167149612.

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

It is a cyclic number.

It is not a de Polignac number, because 216941761 - 2⁵ = 216941729 is a prime.

It is a super-2 number, since 2×216941761² = 94127455331562242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216941761.

It is not an unprimeable number, because it can be changed into a prime (216941731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13231 + ... + 24676.

It is an arithmetic number, because the mean of its divisors is an integer number (27862380).

Almost surely, 2^216941761 is an apocalyptic number.

It is an amenable number.

216941761 is a deficient number, since it is larger than the sum of its proper divisors (5957279).

216941761 is an equidigital number, since it uses as much as digits as its factorization.

216941761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38063.

The product of its digits is 18144, while the sum is 37.

The square root of 216941761 is about 14728.9429695413. The cubic root of 216941761 is about 600.8707366774.

The spelling of 216941761 in words is "two hundred sixteen million, nine hundred forty-one thousand, seven hundred sixty-one".