51269 has 4 divisors (see below), whose sum is σ = 51744. Its totient is φ = 50796.

The previous prime is 51263. The next prime is 51283. The reversal of 51269 is 96215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51269 is a prime.

It is a super-2 number, since 2×51269² = 5257020722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 320.

It is an arithmetic number, because the mean of its divisors is an integer number (12936).

2⁵¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

51269 is a deficient number, since it is larger than the sum of its proper divisors (475).

51269 is a wasteful number, since it uses less digits than its factorization.

51269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its digits is 540, while the sum is 23.

The square root of 51269 is about 226.4265885447. The cubic root of 51269 is about 37.1493838911.

The spelling of 51269 in words is "fifty-one thousand, two hundred sixty-nine".