216021369 has 8 divisors (see below), whose sum is σ = 288100800. Its totient is φ = 143978096.

The previous prime is 216021367. The next prime is 216021371. The reversal of 216021369 is 963120612.

216021369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216021367) and next prime (216021371).

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 216021369 - 2¹ = 216021367 is a prime.

It is a super-2 number, since 2×216021369² = 93330463729268322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216021367) 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, 11707 + ... + 23855.

It is an arithmetic number, because the mean of its divisors is an integer number (36012600).

Almost surely, 2^216021369 is an apocalyptic number.

It is an amenable number.

216021369 is a deficient number, since it is larger than the sum of its proper divisors (72079431).

216021369 is a wasteful number, since it uses less digits than its factorization.

216021369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18079.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 216021369 is about 14697.6654268629. The cubic root of 216021369 is about 600.0197854587.

The spelling of 216021369 in words is "two hundred sixteen million, twenty-one thousand, three hundred sixty-nine".