255531078 has 64 divisors (see below), whose sum is σ = 639498240. Its totient is φ = 74930400.

The previous prime is 255531061. The next prime is 255531083. The reversal of 255531078 is 870135552.

255531078 is a `hidden beast` number, since 2 + 55 + 531 + 0 + 78 = 666.

255531078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×255531078² = 130592263647684168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11476 + ... + 25352.

It is an arithmetic number, because the mean of its divisors is an integer number (9992160).

Almost surely, 2^255531078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255531078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319749120).

255531078 is an abundant number, since it is smaller than the sum of its proper divisors (383967162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255531078 is a wasteful number, since it uses less digits than its factorization.

255531078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930 (or 13924 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 255531078 is about 15985.3394709027. The cubic root of 255531078 is about 634.5724925417.

It can be divided in two parts, 2555 and 31078, that added together give a palindrome (33633).

The spelling of 255531078 in words is "two hundred fifty-five million, five hundred thirty-one thousand, seventy-eight".