216011641 has 4 divisors (see below), whose sum is σ = 217142784. Its totient is φ = 214880500.

The previous prime is 216011557. The next prime is 216011669. The reversal of 216011641 is 146110612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216011641 - 2¹¹ = 216009593 is a prime.

It is a super-2 number, since 2×216011641² = 93322058095025762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216011041) 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 3 ways as a sum of consecutive naturals, for example, 565285 + ... + 565666.

It is an arithmetic number, because the mean of its divisors is an integer number (54285696).

Almost surely, 2^216011641 is an apocalyptic number.

It is an amenable number.

216011641 is a deficient number, since it is larger than the sum of its proper divisors (1131143).

216011641 is a wasteful number, since it uses less digits than its factorization.

216011641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131142.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 216011641 is about 14697.3344862257. The cubic root of 216011641 is about 600.0107785101.

The spelling of 216011641 in words is "two hundred sixteen million, eleven thousand, six hundred forty-one".