545020043 has 4 divisors (see below), whose sum is σ = 545281800. Its totient is φ = 544758288.

The previous prime is 545020001. The next prime is 545020057. The reversal of 545020043 is 340020545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545020043 - 2²² = 540825739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545020243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127730 + ... + 131927.

It is an arithmetic number, because the mean of its divisors is an integer number (136320450).

Almost surely, 2^545020043 is an apocalyptic number.

545020043 is a deficient number, since it is larger than the sum of its proper divisors (261757).

545020043 is a wasteful number, since it uses less digits than its factorization.

545020043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261756.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 545020043 is about 23345.6643298065. The cubic root of 545020043 is about 816.8409302055.

Adding to 545020043 its reverse (340020545), we get a palindrome (885040588).

The spelling of 545020043 in words is "five hundred forty-five million, twenty thousand, forty-three".