505121043 has 32 divisors (see below), whose sum is σ = 814809600. Its totient is φ = 272192256.

The previous prime is 505121041. The next prime is 505121047. The reversal of 505121043 is 340121505.

It is not a de Polignac number, because 505121043 - 2¹ = 505121041 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (505121041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16543 + ... + 35831.

It is an arithmetic number, because the mean of its divisors is an integer number (25462800).

Almost surely, 2^505121043 is an apocalyptic number.

505121043 is a deficient number, since it is larger than the sum of its proper divisors (309688557).

505121043 is a wasteful number, since it uses less digits than its factorization.

505121043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19371.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 505121043 is about 22474.8980642850. The cubic root of 505121043 is about 796.4010435654.

Adding to 505121043 its reverse (340121505), we get a palindrome (845242548).

The spelling of 505121043 in words is "five hundred five million, one hundred twenty-one thousand, forty-three".