436220221 has 16 divisors (see below), whose sum is σ = 487468800. Its totient is φ = 387929088.

The previous prime is 436220209. The next prime is 436220227. The reversal of 436220221 is 122022634.

It is a cyclic number.

It is not a de Polignac number, because 436220221 - 2⁹ = 436219709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 436220192 and 436220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436220227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138300 + ... + 141418.

It is an arithmetic number, because the mean of its divisors is an integer number (30466800).

Almost surely, 2^436220221 is an apocalyptic number.

It is an amenable number.

436220221 is a deficient number, since it is larger than the sum of its proper divisors (51248579).

436220221 is a wasteful number, since it uses less digits than its factorization.

436220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 436220221 is about 20885.8856886654. The cubic root of 436220221 is about 758.4062985408.

Adding to 436220221 its reverse (122022634), we get a palindrome (558242855).

The spelling of 436220221 in words is "four hundred thirty-six million, two hundred twenty thousand, two hundred twenty-one".