51611 has 8 divisors (see below), whose sum is σ = 60384. Its totient is φ = 43200.

The previous prime is 51607. The next prime is 51613. The reversal of 51611 is 11615.

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

It is a cyclic number.

It is not a de Polignac number, because 51611 - 2² = 51607 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51611.

It is not an unprimeable number, because it can be changed into a prime (51613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (7548).

2⁵¹⁶¹¹ is an apocalyptic number.

51611 is a deficient number, since it is larger than the sum of its proper divisors (8773).

51611 is a wasteful number, since it uses less digits than its factorization.

51611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181.

The product of its digits is 30, while the sum is 14.

The square root of 51611 is about 227.1805449417. The cubic root of 51611 is about 37.2318049962.

The spelling of 51611 in words is "fifty-one thousand, six hundred eleven".