813220941 has 16 divisors (see below), whose sum is σ = 1170853376. Its totient is φ = 499093056.

The previous prime is 813220939. The next prime is 813220973. The reversal of 813220941 is 149022318.

It is not a de Polignac number, because 813220941 - 2¹ = 813220939 is a prime.

It is a super-2 number, since 2×813220941² = 1322656597761850962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813220899 and 813220908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813220901) 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 15 ways as a sum of consecutive naturals, for example, 13405 + ... + 42498.

It is an arithmetic number, because the mean of its divisors is an integer number (73178336).

Almost surely, 2^813220941 is an apocalyptic number.

It is an amenable number.

813220941 is a deficient number, since it is larger than the sum of its proper divisors (357632435).

813220941 is a wasteful number, since it uses less digits than its factorization.

813220941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56292.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 813220941 is about 28517.0289651640. The cubic root of 813220941 is about 933.4036994425.

The spelling of 813220941 in words is "eight hundred thirteen million, two hundred twenty thousand, nine hundred forty-one".