505245543 has 12 divisors (see below), whose sum is σ = 740470584. Its totient is φ = 306209200.

The previous prime is 505245541. The next prime is 505245551. The reversal of 505245543 is 345542505.

It is not a de Polignac number, because 505245543 - 2¹ = 505245541 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505245541) 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 11 ways as a sum of consecutive naturals, for example, 695568 + ... + 696293.

It is an arithmetic number, because the mean of its divisors is an integer number (61705882).

Almost surely, 2^505245543 is an apocalyptic number.

505245543 is a deficient number, since it is larger than the sum of its proper divisors (235225041).

505245543 is a wasteful number, since it uses less digits than its factorization.

505245543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391886 (or 1391875 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 33.

The square root of 505245543 is about 22477.6676503591. The cubic root of 505245543 is about 796.4664693257.

The spelling of 505245543 in words is "five hundred five million, two hundred forty-five thousand, five hundred forty-three".