681822252 has 48 divisors (see below), whose sum is σ = 1769829600. Its totient is φ = 226998720.

The previous prime is 681822209. The next prime is 681822257. The reversal of 681822252 is 252228186.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (681822257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98274 + ... + 104982.

It is an arithmetic number, because the mean of its divisors is an integer number (36871450).

Almost surely, 2^681822252 is an apocalyptic number.

It is an amenable number.

681822252 is an abundant number, since it is smaller than the sum of its proper divisors (1088007348).

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

681822252 is a wasteful number, since it uses less digits than its factorization.

681822252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663 (or 7655 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 681822252 is about 26111.7263312865. The cubic root of 681822252 is about 880.1507369196.

The spelling of 681822252 in words is "six hundred eighty-one million, eight hundred twenty-two thousand, two hundred fifty-two".