51550 has 12 divisors (see below), whose sum is σ = 95976. Its totient is φ = 20600.

The previous prime is 51539. The next prime is 51551. The reversal of 51550 is 5515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 466 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (7998).

2⁵¹⁵⁵⁰ is an apocalyptic number.

51550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51550 is a deficient number, since it is larger than the sum of its proper divisors (44426).

51550 is a wasteful number, since it uses less digits than its factorization.

51550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 51550 is about 227.0462507949. The cubic root of 51550 is about 37.2171308928.

It can be divided in two parts, 515 and 50, that added together give a palindrome (565).

The spelling of 51550 in words is "fifty-one thousand, five hundred fifty".