255516427 has 4 divisors (see below), whose sum is σ = 268964680. Its totient is φ = 242068176.

The previous prime is 255516403. The next prime is 255516431. The reversal of 255516427 is 724615552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255516427 - 2¹¹ = 255514379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255516497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6724098 + ... + 6724135.

It is an arithmetic number, because the mean of its divisors is an integer number (67241170).

Almost surely, 2^255516427 is an apocalyptic number.

255516427 is a deficient number, since it is larger than the sum of its proper divisors (13448253).

255516427 is a wasteful number, since it uses less digits than its factorization.

255516427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13448252.

The product of its digits is 84000, while the sum is 37.

The square root of 255516427 is about 15984.8812006846. The cubic root of 255516427 is about 634.5603644679.

The spelling of 255516427 in words is "two hundred fifty-five million, five hundred sixteen thousand, four hundred twenty-seven".