55173723 has 16 divisors (see below), whose sum is σ = 81962496. Its totient is φ = 32726240.

The previous prime is 55173709. The next prime is 55173737. The reversal of 55173723 is 32737155.

It is an interprime number because it is at equal distance from previous prime (55173709) and next prime (55173737).

It is a cyclic number.

It is not a de Polignac number, because 55173723 - 2¹⁶ = 55108187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55173743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16236 + ... + 19337.

It is an arithmetic number, because the mean of its divisors is an integer number (5122656).

Almost surely, 2^55173723 is an apocalyptic number.

55173723 is a deficient number, since it is larger than the sum of its proper divisors (26788773).

55173723 is a wasteful number, since it uses less digits than its factorization.

55173723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35634.

The product of its digits is 22050, while the sum is 33.

The square root of 55173723 is about 7427.9016552456. The cubic root of 55173723 is about 380.6952254344.

The spelling of 55173723 in words is "fifty-five million, one hundred seventy-three thousand, seven hundred twenty-three".