51623 has 12 divisors (see below), whose sum is σ = 64008. Its totient is φ = 41040.

The previous prime is 51613. The next prime is 51631. The reversal of 51623 is 32615.

It is not a de Polignac number, because 51623 - 2⁴ = 51607 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2708 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (5334).

2⁵¹⁶²³ is an apocalyptic number.

51623 is a deficient number, since it is larger than the sum of its proper divisors (12385).

51623 is a wasteful number, since it uses less digits than its factorization.

51623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 43 counting only the distinct ones).

The product of its digits is 180, while the sum is 17.

The square root of 51623 is about 227.2069541189. The cubic root of 51623 is about 37.2346903439.

The spelling of 51623 in words is "fifty-one thousand, six hundred twenty-three".