813047228781 has 8 divisors (see below), whose sum is σ = 1087548705984. Its totient is φ = 540288618720.

The previous prime is 813047228779. The next prime is 813047228797. The reversal of 813047228781 is 187822740318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813047228781 - 2¹ = 813047228779 is a prime.

It is a super-2 number, since 2×813047228781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813047228701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435715696 + ... + 435717561.

It is an arithmetic number, because the mean of its divisors is an integer number (135943588248).

Almost surely, 2^813047228781 is an apocalyptic number.

It is an amenable number.

813047228781 is a deficient number, since it is larger than the sum of its proper divisors (274501477203).

813047228781 is a wasteful number, since it uses less digits than its factorization.

813047228781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871433571.

The product of its (nonzero) digits is 1204224, while the sum is 51.

The spelling of 813047228781 in words is "eight hundred thirteen billion, forty-seven million, two hundred twenty-eight thousand, seven hundred eighty-one".