36652221 has 12 divisors (see below), whose sum is σ = 56056572. Its totient is φ = 22997376.

The previous prime is 36652181. The next prime is 36652229. The reversal of 36652221 is 12225663.

36652221 is a `hidden beast` number, since 3 + 6 + 652 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19263321 + 17388900 = 4389^2 + 4170^2 .

It is not a de Polignac number, because 36652221 - 2⁷ = 36652093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36652229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119626 + ... + 119931.

It is an arithmetic number, because the mean of its divisors is an integer number (4671381).

Almost surely, 2^36652221 is an apocalyptic number.

It is an amenable number.

36652221 is a deficient number, since it is larger than the sum of its proper divisors (19404351).

36652221 is a wasteful number, since it uses less digits than its factorization.

36652221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239580 (or 239577 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 36652221 is about 6054.1077790208. The cubic root of 36652221 is about 332.1748637309.

Adding to 36652221 its reverse (12225663), we get a palindrome (48877884).

It can be divided in two parts, 3665 and 2221, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 36652221 in words is "thirty-six million, six hundred fifty-two thousand, two hundred twenty-one".