443145681 has 96 divisors (see below), whose sum is σ = 781401600. Its totient is φ = 247104000.

The previous prime is 443145673. The next prime is 443145691. The reversal of 443145681 is 186541344.

It is not a de Polignac number, because 443145681 - 2³ = 443145673 is a prime.

It is a super-2 number, since 2×443145681² = 392756189177907522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443145601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4387531 + ... + 4387631.

It is an arithmetic number, because the mean of its divisors is an integer number (8139600).

Almost surely, 2^443145681 is an apocalyptic number.

It is an amenable number.

443145681 is a deficient number, since it is larger than the sum of its proper divisors (338255919).

443145681 is a wasteful number, since it uses less digits than its factorization.

443145681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 211 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 443145681 is about 21051.0256519724. The cubic root of 443145681 is about 762.3987466016.

The spelling of 443145681 in words is "four hundred forty-three million, one hundred forty-five thousand, six hundred eighty-one".