820522899 has 32 divisors (see below), whose sum is σ = 1394496000. Its totient is φ = 467098272.

The previous prime is 820522883. The next prime is 820522921. The reversal of 820522899 is 998225028.

820522899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 820522899 - 2⁴ = 820522883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820512899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42772 + ... + 58910.

It is an arithmetic number, because the mean of its divisors is an integer number (43578000).

Almost surely, 2^820522899 is an apocalyptic number.

820522899 is a deficient number, since it is larger than the sum of its proper divisors (573973101).

820522899 is a wasteful number, since it uses less digits than its factorization.

820522899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16424 (or 16418 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 820522899 is about 28644.7708840549. The cubic root of 820522899 is about 936.1890746408.

The spelling of 820522899 in words is "eight hundred twenty million, five hundred twenty-two thousand, eight hundred ninety-nine".