681223180 has 48 divisors (see below), whose sum is σ = 1562599584. Its totient is φ = 247403520.

The previous prime is 681223139. The next prime is 681223219. The reversal of 681223180 is 81322186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239044 + ... + 241876.

It is an arithmetic number, because the mean of its divisors is an integer number (32554158).

Almost surely, 2^681223180 is an apocalyptic number.

It is an amenable number.

681223180 is an abundant number, since it is smaller than the sum of its proper divisors (881376404).

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

681223180 is a wasteful number, since it uses less digits than its factorization.

681223180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946 (or 3944 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 681223180 is about 26100.2524892002. The cubic root of 681223180 is about 879.8928846895.

It can be divided in two parts, 6812 and 23180, that added together give a palindrome (29992).

The spelling of 681223180 in words is "six hundred eighty-one million, two hundred twenty-three thousand, one hundred eighty".