1255505550 has 48 divisors (see below), whose sum is σ = 3353170800. Its totient is φ = 309047040.

The previous prime is 1255505519. The next prime is 1255505551. The reversal of 1255505550 is 555055521.

1255505550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255505551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319975 + ... + 323874.

It is an arithmetic number, because the mean of its divisors is an integer number (69857725).

Almost surely, 2^1255505550 is an apocalyptic number.

1255505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1255505550 is an abundant number, since it is smaller than the sum of its proper divisors (2097665250).

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

1255505550 is a wasteful number, since it uses less digits than its factorization.

1255505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643877 (or 643872 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 33.

The square root of 1255505550 is about 35433.1137497116. The cubic root of 1255505550 is about 1078.7965418420.

The spelling of 1255505550 in words is "one billion, two hundred fifty-five million, five hundred five thousand, five hundred fifty".