220431441 has 4 divisors (see below), whose sum is σ = 293908592. Its totient is φ = 146954292.

The previous prime is 220431439. The next prime is 220431451. The reversal of 220431441 is 144134022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 220431441 - 2¹ = 220431439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220431451) 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 3 ways as a sum of consecutive naturals, for example, 36738571 + ... + 36738576.

It is an arithmetic number, because the mean of its divisors is an integer number (73477148).

Almost surely, 2^220431441 is an apocalyptic number.

It is an amenable number.

220431441 is a deficient number, since it is larger than the sum of its proper divisors (73477151).

220431441 is an equidigital number, since it uses as much as digits as its factorization.

220431441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73477150.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 220431441 is about 14846.9337238367. The cubic root of 220431441 is about 604.0754413976.

Adding to 220431441 its reverse (144134022), we get a palindrome (364565463).

The spelling of 220431441 in words is "two hundred twenty million, four hundred thirty-one thousand, four hundred forty-one".