681332100 has 36 divisors (see below), whose sum is σ = 1971321744. Its totient is φ = 181688480.

The previous prime is 681332089. The next prime is 681332107. The reversal of 681332100 is 1233186.

It is not an unprimeable number, because it can be changed into a prime (681332107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1135254 + ... + 1135853.

Almost surely, 2^681332100 is an apocalyptic number.

681332100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681332100 is an abundant number, since it is smaller than the sum of its proper divisors (1289989644).

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

681332100 is a wasteful number, since it uses less digits than its factorization.

681332100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271124 (or 2271117 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 681332100 is about 26102.3389756550. The cubic root of 681332100 is about 879.9397772148.

Adding to 681332100 its reverse (1233186), we get a palindrome (682565286).

The spelling of 681332100 in words is "six hundred eighty-one million, three hundred thirty-two thousand, one hundred".