220331444 has 48 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 101033856.

The previous prime is 220331393. The next prime is 220331453. The reversal of 220331444 is 444133022.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717539 + ... + 717845.

It is an arithmetic number, because the mean of its divisors is an integer number (8731800).

Almost surely, 2^220331444 is an apocalyptic number.

It is an amenable number.

220331444 is a deficient number, since it is larger than the sum of its proper divisors (198794956).

220331444 is a wasteful number, since it uses less digits than its factorization.

220331444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 220331444 is about 14843.5657441196. The cubic root of 220331444 is about 603.9840828810.

Adding to 220331444 its reverse (444133022), we get a palindrome (664464466).

The spelling of 220331444 in words is "two hundred twenty million, three hundred thirty-one thousand, four hundred forty-four".