255538477 has 4 divisors (see below), whose sum is σ = 255591616. Its totient is φ = 255485340.

The previous prime is 255538457. The next prime is 255538519. The reversal of 255538477 is 774835552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255538477 - 2¹⁵ = 255505709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255538417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18549 + ... + 29242.

It is an arithmetic number, because the mean of its divisors is an integer number (63897904).

Almost surely, 2^255538477 is an apocalyptic number.

It is an amenable number.

255538477 is a deficient number, since it is larger than the sum of its proper divisors (53139).

255538477 is an equidigital number, since it uses as much as digits as its factorization.

255538477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53138.

The product of its digits is 1176000, while the sum is 46.

The square root of 255538477 is about 15985.5709000336. The cubic root of 255538477 is about 634.5786172455.

The spelling of 255538477 in words is "two hundred fifty-five million, five hundred thirty-eight thousand, four hundred seventy-seven".