545550 has 24 divisors (see below), whose sum is σ = 1353336. Its totient is φ = 145440.

The previous prime is 545549. The next prime is 545551. The reversal of 545550 is 55545.

It is an interprime number because it is at equal distance from previous prime (545549) and next prime (545551).

It is a self number, because there is not a number n which added to its sum of digits gives 545550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545551) 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, 1669 + ... + 1968.

It is an arithmetic number, because the mean of its divisors is an integer number (56389).

2⁵⁴⁵⁵⁵⁰ is an apocalyptic number.

545550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

545550 is an abundant number, since it is smaller than the sum of its proper divisors (807786).

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

545550 is a wasteful number, since it uses less digits than its factorization.

545550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 545550 is about 738.6135660818. The cubic root of 545550 is about 81.7105599576.

The spelling of 545550 in words is "five hundred forty-five thousand, five hundred fifty".