51250 has 20 divisors (see below), whose sum is σ = 98406. Its totient is φ = 20000.

The previous prime is 51241. The next prime is 51257. The reversal of 51250 is 5215.

It can be written as a sum of positive squares in 5 ways, for example, as 1521 + 49729 = 39^2 + 223^2 .

It is a plaindrome in base 12.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 51250.

It is not an unprimeable number, because it can be changed into a prime (51257) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1230 + ... + 1270.

2⁵¹²⁵⁰ is an apocalyptic number.

51250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51250 is a deficient number, since it is larger than the sum of its proper divisors (47156).

51250 is an equidigital number, since it uses as much as digits as its factorization.

51250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 51250 is about 226.3846284534. The cubic root of 51250 is about 37.1447942072.

Adding to 51250 its reverse (5215), we get a palindrome (56465).

It can be divided in two parts, 512 and 50, that multiplied together give a square (25600 = 160²).

The spelling of 51250 in words is "fifty-one thousand, two hundred fifty".