681171232 has 96 divisors (see below), whose sum is σ = 1638185472. Its totient is φ = 272154624.

The previous prime is 681171203. The next prime is 681171241. The reversal of 681171232 is 232171186.

It is a junction number, because it is equal to n+sod(n) for n = 681171194 and 681171203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429513 + ... + 431095.

It is an arithmetic number, because the mean of its divisors is an integer number (17064432).

Almost surely, 2^681171232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681171232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819092736).

681171232 is an abundant number, since it is smaller than the sum of its proper divisors (957014240).

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

681171232 is a wasteful number, since it uses less digits than its factorization.

681171232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730 (or 1722 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 681171232 is about 26099.2573074408. The cubic root of 681171232 is about 879.8705181393.

The spelling of 681171232 in words is "six hundred eighty-one million, one hundred seventy-one thousand, two hundred thirty-two".