255129617 has 8 divisors (see below), whose sum is σ = 265117440. Its totient is φ = 245221200.

The previous prime is 255129607. The next prime is 255129619. The reversal of 255129617 is 716921552.

It is a happy number.

255129617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 255129617 - 2⁴ = 255129601 is a prime.

It is a super-2 number, since 2×255129617² = 130182242941133378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255129619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13259 + ... + 26192.

It is an arithmetic number, because the mean of its divisors is an integer number (33139680).

Almost surely, 2^255129617 is an apocalyptic number.

It is an amenable number.

255129617 is a deficient number, since it is larger than the sum of its proper divisors (9987823).

255129617 is a wasteful number, since it uses less digits than its factorization.

255129617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39703.

The product of its digits is 37800, while the sum is 38.

The square root of 255129617 is about 15972.7773727677. Note that the first 3 decimals coincide. The cubic root of 255129617 is about 634.2399959487.

The spelling of 255129617 in words is "two hundred fifty-five million, one hundred twenty-nine thousand, six hundred seventeen".