441311813 has 4 divisors (see below), whose sum is σ = 441360780. Its totient is φ = 441262848.

The previous prime is 441311809. The next prime is 441311831. The reversal of 441311813 is 318113144.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 300224929 + 141086884 = 17327^2 + 11878^2 .

It is a cyclic number.

It is not a de Polignac number, because 441311813 - 2² = 441311809 is a prime.

It is a super-2 number, since 2×441311813² = 389512232586693938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441311863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6620 + ... + 30437.

It is an arithmetic number, because the mean of its divisors is an integer number (110340195).

Almost surely, 2^441311813 is an apocalyptic number.

It is an amenable number.

441311813 is a deficient number, since it is larger than the sum of its proper divisors (48967).

441311813 is a wasteful number, since it uses less digits than its factorization.

441311813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48966.

The product of its digits is 1152, while the sum is 26.

The square root of 441311813 is about 21007.4228071889. The cubic root of 441311813 is about 761.3456153115.

Adding to 441311813 its reverse (318113144), we get a palindrome (759424957).

The spelling of 441311813 in words is "four hundred forty-one million, three hundred eleven thousand, eight hundred thirteen".