820220522 has 24 divisors (see below), whose sum is σ = 1431904068. Its totient is φ = 350894720.

The previous prime is 820220501. The next prime is 820220629. The reversal of 820220522 is 225022028.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 793605241 + 26615281 = 28171^2 + 5159^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95573 + ... + 103800.

Almost surely, 2^820220522 is an apocalyptic number.

820220522 is a deficient number, since it is larger than the sum of its proper divisors (611683546).

820220522 is a wasteful number, since it uses less digits than its factorization.

820220522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199414 (or 199403 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 820220522 is about 28639.4923488528. The cubic root of 820220522 is about 936.0740598436.

The spelling of 820220522 in words is "eight hundred twenty million, two hundred twenty thousand, five hundred twenty-two".