51266 has 4 divisors (see below), whose sum is σ = 76902. Its totient is φ = 25632.

The previous prime is 51263. The next prime is 51283. The reversal of 51266 is 66215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46225 + 5041 = 215^2 + 71^2 .

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (51263) by changing a digit.

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, 12815 + ... + 12818.

2⁵¹²⁶⁶ is an apocalyptic number.

51266 is a deficient number, since it is larger than the sum of its proper divisors (25636).

51266 is a wasteful number, since it uses less digits than its factorization.

51266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25635.

The product of its digits is 360, while the sum is 20.

The square root of 51266 is about 226.4199637841. The cubic root of 51266 is about 37.1486592796.

The spelling of 51266 in words is "fifty-one thousand, two hundred sixty-six".