255115993 has 16 divisors (see below), whose sum is σ = 283668480. Its totient is φ = 227491600.

The previous prime is 255115951. The next prime is 255115997. The reversal of 255115993 is 399511552.

It is a cyclic number.

It is not a de Polignac number, because 255115993 - 2²¹ = 253018841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255115997) 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, 176568 + ... + 178006.

It is an arithmetic number, because the mean of its divisors is an integer number (17729280).

Almost surely, 2^255115993 is an apocalyptic number.

It is an amenable number.

255115993 is a deficient number, since it is larger than the sum of its proper divisors (28552487).

255115993 is a wasteful number, since it uses less digits than its factorization.

255115993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748.

The product of its digits is 60750, while the sum is 40.

The square root of 255115993 is about 15972.3508914624. The cubic root of 255115993 is about 634.2287062108.

The spelling of 255115993 in words is "two hundred fifty-five million, one hundred fifteen thousand, nine hundred ninety-three".