681285522 has 8 divisors (see below), whose sum is σ = 1362571056. Its totient is φ = 227095172.

The previous prime is 681285509. The next prime is 681285529. The reversal of 681285522 is 225582186.

681285522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

681285522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (681285529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56773788 + ... + 56773799.

It is an arithmetic number, because the mean of its divisors is an integer number (170321382).

Almost surely, 2^681285522 is an apocalyptic number.

681285522 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.

681285522 is a wasteful number, since it uses less digits than its factorization.

681285522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113547592.

The product of its digits is 76800, while the sum is 39.

The square root of 681285522 is about 26101.4467415122. The cubic root of 681285522 is about 879.9197249432.

The spelling of 681285522 in words is "six hundred eighty-one million, two hundred eighty-five thousand, five hundred twenty-two".