681505223 has 8 divisors (see below), whose sum is σ = 779480448. Its totient is φ = 583684344.

The previous prime is 681505211. The next prime is 681505247. The reversal of 681505223 is 322505186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681505223 - 2⁶ = 681505159 is a prime.

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 681505223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681505273) 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 7 ways as a sum of consecutive naturals, for example, 28961 + ... + 46922.

It is an arithmetic number, because the mean of its divisors is an integer number (97435056).

Almost surely, 2^681505223 is an apocalyptic number.

681505223 is a deficient number, since it is larger than the sum of its proper divisors (97975225).

681505223 is a wasteful number, since it uses less digits than its factorization.

681505223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77173.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 681505223 is about 26105.6550004017. The cubic root of 681505223 is about 880.0143003014.

The spelling of 681505223 in words is "six hundred eighty-one million, five hundred five thousand, two hundred twenty-three".