255247729 has 16 divisors (see below), whose sum is σ = 297927360. Its totient is φ = 216216000.

The previous prime is 255247717. The next prime is 255247757. The reversal of 255247729 is 927742552.

It is not a de Polignac number, because 255247729 - 2⁵ = 255247697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255247709) 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, 2739 + ... + 22759.

It is an arithmetic number, because the mean of its divisors is an integer number (18620460).

Almost surely, 2^255247729 is an apocalyptic number.

It is an amenable number.

255247729 is a deficient number, since it is larger than the sum of its proper divisors (42679631).

255247729 is a wasteful number, since it uses less digits than its factorization.

255247729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112.

The product of its digits is 352800, while the sum is 43.

The square root of 255247729 is about 15976.4742355753. The cubic root of 255247729 is about 634.3378544388.

The spelling of 255247729 in words is "two hundred fifty-five million, two hundred forty-seven thousand, seven hundred twenty-nine".