51236 has 6 divisors (see below), whose sum is σ = 89670. Its totient is φ = 25616.

The previous prime is 51229. The next prime is 51239. The reversal of 51236 is 63215.

It can be written as a sum of positive squares in only one way, i.e., 40000 + 11236 = 200^2 + 106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51239) by changing a digit.

51236 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6401 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (14945).

2⁵¹²³⁶ is an apocalyptic number.

It is an amenable number.

51236 is a deficient number, since it is larger than the sum of its proper divisors (38434).

51236 is a wasteful number, since it uses less digits than its factorization.

51236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813 (or 12811 counting only the distinct ones).

The product of its digits is 180, while the sum is 17.

The square root of 51236 is about 226.3537055142. The cubic root of 51236 is about 37.1414116090.

The spelling of 51236 in words is "fifty-one thousand, two hundred thirty-six".