51158 has 4 divisors (see below), whose sum is σ = 76740. Its totient is φ = 25578.

The previous prime is 51157. The next prime is 51169. The reversal of 51158 is 85115.

51158 is nontrivially palindromic in base 5.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788 + ... + 12791.

It is an arithmetic number, because the mean of its divisors is an integer number (19185).

2⁵¹¹⁵⁸ is an apocalyptic number.

51158 is a deficient number, since it is larger than the sum of its proper divisors (25582).

51158 is a wasteful number, since it uses less digits than its factorization.

51158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25581.

The product of its digits is 200, while the sum is 20.

The square root of 51158 is about 226.1813431740. The cubic root of 51158 is about 37.1225544157.

The spelling of 51158 in words is "fifty-one thousand, one hundred fifty-eight".