220431444 has 12 divisors (see below), whose sum is σ = 514340064. Its totient is φ = 73477144.

The previous prime is 220431439. The next prime is 220431451. The reversal of 220431444 is 444134022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 9184632 + ... + 9184655.

It is an arithmetic number, because the mean of its divisors is an integer number (42861672).

Almost surely, 2^220431444 is an apocalyptic number.

It is an amenable number.

220431444 is an abundant number, since it is smaller than the sum of its proper divisors (293908620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220431444 is a wasteful number, since it uses less digits than its factorization.

220431444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18369294 (or 18369292 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 220431444 is about 14846.9338248677. The cubic root of 220431444 is about 604.0754441380.

Adding to 220431444 its reverse (444134022), we get a palindrome (664565466).

The spelling of 220431444 in words is "two hundred twenty million, four hundred thirty-one thousand, four hundred forty-four".