55723 has 4 divisors (see below), whose sum is σ = 56368. Its totient is φ = 55080.

The previous prime is 55721. The next prime is 55733. The reversal of 55723 is 32755.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32755 = 5 ⋅6551.

It is a cyclic number.

It is not a de Polignac number, because 55723 - 2¹ = 55721 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 55694 and 55703.

It is not an unprimeable number, because it can be changed into a prime (55721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 373.

It is an arithmetic number, because the mean of its divisors is an integer number (14092).

2⁵⁵⁷²³ is an apocalyptic number.

55723 is a deficient number, since it is larger than the sum of its proper divisors (645).

55723 is a wasteful number, since it uses less digits than its factorization.

55723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its digits is 1050, while the sum is 22.

The square root of 55723 is about 236.0571964588. The cubic root of 55723 is about 38.1954381768.

The spelling of 55723 in words is "fifty-five thousand, seven hundred twenty-three".