51658 has 8 divisors (see below), whose sum is σ = 80928. Its totient is φ = 24684.

The previous prime is 51647. The next prime is 51659. The reversal of 51658 is 85615.

51658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51659) by changing a digit.

51658 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (10116).

2⁵¹⁶⁵⁸ is an apocalyptic number.

51658 is a deficient number, since it is larger than the sum of its proper divisors (29270).

51658 is a wasteful number, since it uses less digits than its factorization.

51658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 1200, while the sum is 25.

The square root of 51658 is about 227.2839633586. The cubic root of 51658 is about 37.2431033882.

The spelling of 51658 in words is "fifty-one thousand, six hundred fifty-eight".