818211041 has 4 divisors (see below), whose sum is σ = 861274800. Its totient is φ = 775147284.

The previous prime is 818211019. The next prime is 818211061. The reversal of 818211041 is 140112818.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140112818 = 2 ⋅70056409.

It is a cyclic number.

It is not a de Polignac number, because 818211041 - 2⁶ = 818210977 is a prime.

It is a super-2 number, since 2×818211041² = 1338938615228607362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 818211041.

It is not an unprimeable number, because it can be changed into a prime (818211061) 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, 21531851 + ... + 21531888.

It is an arithmetic number, because the mean of its divisors is an integer number (215318700).

Almost surely, 2^818211041 is an apocalyptic number.

It is an amenable number.

818211041 is a deficient number, since it is larger than the sum of its proper divisors (43063759).

818211041 is a wasteful number, since it uses less digits than its factorization.

818211041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43063758.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 818211041 is about 28604.3884919779. The cubic root of 818211041 is about 935.3089967883.

Adding to 818211041 its reverse (140112818), we get a palindrome (958323859).

The spelling of 818211041 in words is "eight hundred eighteen million, two hundred eleven thousand, forty-one".