36224821 has 2 divisors, whose sum is σ = 36224822. Its totient is φ = 36224820.

The previous prime is 36224809. The next prime is 36224861. The reversal of 36224821 is 12842263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 1473796 = 5895^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 36224821 - 2⁷ = 36224693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36224821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36224861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18112410 + 18112411.

It is an arithmetic number, because the mean of its divisors is an integer number (18112411).

Almost surely, 2^36224821 is an apocalyptic number.

It is an amenable number.

36224821 is a deficient number, since it is larger than the sum of its proper divisors (1).

36224821 is an equidigital number, since it uses as much as digits as its factorization.

36224821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 36224821 is about 6018.7059240338. The cubic root of 36224821 is about 330.8786532307.

The spelling of 36224821 in words is "thirty-six million, two hundred twenty-four thousand, eight hundred twenty-one".