682331581 has 4 divisors (see below), whose sum is σ = 682429212. Its totient is φ = 682233952.

The previous prime is 682331579. The next prime is 682331597. The reversal of 682331581 is 185133286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123765625 + 558565956 = 11125^2 + 23634^2 .

It is a cyclic number.

It is not a de Polignac number, because 682331581 - 2¹ = 682331579 is a prime.

It is a super-2 number, since 2×682331581² = 931152772859919122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 682331581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682331521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37450 + ... + 52603.

It is an arithmetic number, because the mean of its divisors is an integer number (170607303).

Almost surely, 2^682331581 is an apocalyptic number.

It is an amenable number.

682331581 is a deficient number, since it is larger than the sum of its proper divisors (97631).

682331581 is an equidigital number, since it uses as much as digits as its factorization.

682331581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97630.

The product of its digits is 34560, while the sum is 37.

The square root of 682331581 is about 26121.4773893055. The cubic root of 682331581 is about 880.3698432505.

The spelling of 682331581 in words is "six hundred eighty-two million, three hundred thirty-one thousand, five hundred eighty-one".