36302221 has 2 divisors, whose sum is σ = 36302222. Its totient is φ = 36302220.

The previous prime is 36302207. The next prime is 36302251. The reversal of 36302221 is 12220363.

36302221 = T₄₉₁₈ + T₄₉₁₉ + T₄₉₂₀.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 6817321 = 5430^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 36302221 - 2⁷ = 36302093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36302251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18151110 + 18151111.

It is an arithmetic number, because the mean of its divisors is an integer number (18151111).

Almost surely, 2^36302221 is an apocalyptic number.

36302221 is the 4920-th centered triangular number.

It is an amenable number.

36302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

36302221 is an equidigital number, since it uses as much as digits as its factorization.

36302221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 36302221 is about 6025.1324466770. The cubic root of 36302221 is about 331.1141436002.

Adding to 36302221 its reverse (12220363), we get a palindrome (48522584).

The spelling of 36302221 in words is "thirty-six million, three hundred two thousand, two hundred twenty-one".