155020543 has 4 divisors (see below), whose sum is σ = 155046528. Its totient is φ = 154994560.

The previous prime is 155020517. The next prime is 155020559. The reversal of 155020543 is 345020551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155020543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155023543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930 + ... + 17632.

It is an arithmetic number, because the mean of its divisors is an integer number (38761632).

Almost surely, 2^155020543 is an apocalyptic number.

155020543 is a deficient number, since it is larger than the sum of its proper divisors (25985).

155020543 is an equidigital number, since it uses as much as digits as its factorization.

155020543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25984.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 155020543 is about 12450.7245973879. The cubic root of 155020543 is about 537.1922657434.

The spelling of 155020543 in words is "one hundred fifty-five million, twenty thousand, five hundred forty-three".