36213621 has 32 divisors (see below), whose sum is σ = 52939008. Its totient is φ = 21934080.

The previous prime is 36213599. The next prime is 36213623. The reversal of 36213621 is 12631263.

It is a happy number.

It is not a de Polignac number, because 36213621 - 2⁵ = 36213589 is a prime.

It is a super-2 number, since 2×36213621² = 2622852691863282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 36213591 and 36213600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36213623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264265 + ... + 264401.

It is an arithmetic number, because the mean of its divisors is an integer number (1654344).

Almost surely, 2^36213621 is an apocalyptic number.

It is an amenable number.

36213621 is a deficient number, since it is larger than the sum of its proper divisors (16725387).

36213621 is a wasteful number, since it uses less digits than its factorization.

36213621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

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

The square root of 36213621 is about 6017.7754195384. The cubic root of 36213621 is about 330.8445493317.

Adding to 36213621 its reverse (12631263), we get a palindrome (48844884).

The spelling of 36213621 in words is "thirty-six million, two hundred thirteen thousand, six hundred twenty-one".