813285522 has 56 divisors (see below), whose sum is σ = 2090375616. Its totient is φ = 232364376.

The previous prime is 813285467. The next prime is 813285523. The reversal of 813285522 is 225582318.

813285522 is a `hidden beast` number, since 81 + 3 + 28 + 552 + 2 = 666.

It is a super-2 number, since 2×813285522² = 1322866680589624968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813285523) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 29638 + ... + 50049.

It is an arithmetic number, because the mean of its divisors is an integer number (37328136).

Almost surely, 2^813285522 is an apocalyptic number.

813285522 is an abundant number, since it is smaller than the sum of its proper divisors (1277090094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813285522 is an equidigital number, since it uses as much as digits as its factorization.

813285522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79714 (or 79699 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 813285522 is about 28518.1612661125. The cubic root of 813285522 is about 933.4284071801.

The spelling of 813285522 in words is "eight hundred thirteen million, two hundred eighty-five thousand, five hundred twenty-two".