816143441 has 4 divisors (see below), whose sum is σ = 819246912. Its totient is φ = 813039972.

The previous prime is 816143437. The next prime is 816143459. The reversal of 816143441 is 144341618.

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 a cyclic number.

It is not a de Polignac number, because 816143441 - 2² = 816143437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816143398 and 816143407.

It is not an unprimeable number, because it can be changed into a prime (816143641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551341 + ... + 1551866.

It is an arithmetic number, because the mean of its divisors is an integer number (204811728).

Almost surely, 2^816143441 is an apocalyptic number.

It is an amenable number.

816143441 is a deficient number, since it is larger than the sum of its proper divisors (3103471).

816143441 is a wasteful number, since it uses less digits than its factorization.

816143441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103470.

The product of its digits is 9216, while the sum is 32.

The square root of 816143441 is about 28568.2243235382. The cubic root of 816143441 is about 934.5204976513.

The spelling of 816143441 in words is "eight hundred sixteen million, one hundred forty-three thousand, four hundred forty-one".