336216021 has 16 divisors (see below), whose sum is σ = 480672000. Its totient is φ = 208286208.

The previous prime is 336215989. The next prime is 336216029. The reversal of 336216021 is 120612633.

It is a happy number.

It is not a de Polignac number, because 336216021 - 2⁵ = 336215989 is a prime.

It is a super-4 number, since 4×336216021⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 336215982 and 336216000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (336216029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37696 + ... + 45753.

It is an arithmetic number, because the mean of its divisors is an integer number (30042000).

Almost surely, 2^336216021 is an apocalyptic number.

It is an amenable number.

336216021 is a deficient number, since it is larger than the sum of its proper divisors (144455979).

336216021 is a wasteful number, since it uses less digits than its factorization.

336216021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83548.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 336216021 is about 18336.1942888921. The cubic root of 336216021 is about 695.3542841137.

Adding to 336216021 its reverse (120612633), we get a palindrome (456828654).

The spelling of 336216021 in words is "three hundred thirty-six million, two hundred sixteen thousand, twenty-one".