681217255 has 16 divisors (see below), whose sum is σ = 838341504. Its totient is φ = 531083520.

The previous prime is 681217169. The next prime is 681217297. The reversal of 681217255 is 552712186.

681217255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681217255 - 2²⁹ = 144346343 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 296722 + ... + 299008.

It is an arithmetic number, because the mean of its divisors is an integer number (52396344).

Almost surely, 2^681217255 is an apocalyptic number.

681217255 is a deficient number, since it is larger than the sum of its proper divisors (157124249).

681217255 is a wasteful number, since it uses less digits than its factorization.

681217255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786.

The product of its digits is 33600, while the sum is 37.

The square root of 681217255 is about 26100.1389843043. The cubic root of 681217255 is about 879.8903336996.

It can be divided in two parts, 681217 and 255, that added together give a cube (681472 = 88³).

The spelling of 681217255 in words is "six hundred eighty-one million, two hundred seventeen thousand, two hundred fifty-five".