501145243453123 has 4 divisors (see below), whose sum is σ = 510600814084368. Its totient is φ = 491689672821880.

The previous prime is 501145243453117. The next prime is 501145243453163. The reversal of 501145243453123 is 321354342541105.

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 501145243453123 - 2⁹ = 501145243452611 is a prime.

It is a super-2 number, since 2×501145243453123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501145243453123.

It is not an unprimeable number, because it can be changed into a prime (501145243453163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4727785315543 + ... + 4727785315648.

It is an arithmetic number, because the mean of its divisors is an integer number (127650203521092).

Almost surely, 2^{501145243453123} is an apocalyptic number.

501145243453123 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

501145243453123 is a deficient number, since it is larger than the sum of its proper divisors (9455570631245).

501145243453123 is an equidigital number, since it uses as much as digits as its factorization.

501145243453123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9455570631244.

The product of its (nonzero) digits is 864000, while the sum is 43.

Adding to 501145243453123 its reverse (321354342541105), we get a palindrome (822499585994228).

The spelling of 501145243453123 in words is "five hundred one trillion, one hundred forty-five billion, two hundred forty-three million, four hundred fifty-three thousand, one hundred twenty-three".