43554 has 32 divisors (see below), whose sum is σ = 107136. Its totient is φ = 11520.

The previous prime is 43543. The next prime is 43573. The reversal of 43554 is 45534.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 43554.

It is a congruent number.

It is an unprimeable number.

43554 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 15 ways as a sum of consecutive naturals, for example, 684 + ... + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (3348).

2⁴³⁵⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53568).

43554 is an abundant number, since it is smaller than the sum of its proper divisors (63582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43554 is a wasteful number, since it uses less digits than its factorization.

43554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90.

The product of its digits is 1200, while the sum is 21.

The square root of 43554 is about 208.6959510867. The cubic root of 43554 is about 35.1837950547.

The spelling of 43554 in words is "forty-three thousand, five hundred fifty-four".