820437522 has 8 divisors (see below), whose sum is σ = 1640875056. Its totient is φ = 273479172.

The previous prime is 820437481. The next prime is 820437529. The reversal of 820437522 is 225734028.

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

820437522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (820437529) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 68369788 + ... + 68369799.

It is an arithmetic number, because the mean of its divisors is an integer number (205109382).

Almost surely, 2^820437522 is an apocalyptic number.

820437522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

820437522 is a wasteful number, since it uses less digits than its factorization.

820437522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136739592.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 820437522 is about 28643.2805732863. The cubic root of 820437522 is about 936.1566027511.

The spelling of 820437522 in words is "eight hundred twenty million, four hundred thirty-seven thousand, five hundred twenty-two".