51277 has 4 divisors (see below), whose sum is σ = 52416. Its totient is φ = 50140.

The previous prime is 51263. The next prime is 51283. The reversal of 51277 is 77215.

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 an emirpimes, since its reverse is a distinct semiprime: 77215 = 5 ⋅15443.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51277 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499 + ... + 592.

It is an arithmetic number, because the mean of its divisors is an integer number (13104).

2⁵¹²⁷⁷ is an apocalyptic number.

It is an amenable number.

51277 is a deficient number, since it is larger than the sum of its proper divisors (1139).

51277 is a wasteful number, since it uses less digits than its factorization.

51277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 490, while the sum is 22.

The square root of 51277 is about 226.4442536255. Note that the first 3 decimals coincide. The cubic root of 51277 is about 37.1513160503.

The spelling of 51277 in words is "fifty-one thousand, two hundred seventy-seven".