820070522 has 16 divisors (see below), whose sum is σ = 1235272200. Its totient is φ = 408317760.

The previous prime is 820070507. The next prime is 820070551. The reversal of 820070522 is 225070028.

It can be written as a sum of positive squares in 4 ways, for example, as 506745121 + 313325401 = 22511^2 + 17701^2 .

It is a super-2 number, since 2×820070522² = 1345031322106704968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 820070491 and 820070500.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 766604 + ... + 767672.

Almost surely, 2^820070522 is an apocalyptic number.

820070522 is a deficient number, since it is larger than the sum of its proper divisors (415201678).

820070522 is a wasteful number, since it uses less digits than its factorization.

820070522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 820070522 is about 28636.8734676116. The cubic root of 820070522 is about 936.0169940239.

The spelling of 820070522 in words is "eight hundred twenty million, seventy thousand, five hundred twenty-two".