505045421131253 has 4 divisors (see below), whose sum is σ = 505765885356108. Its totient is φ = 504324956906400.

The previous prime is 505045421131219. The next prime is 505045421131259. The reversal of 505045421131253 is 352131124540505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 440678464629649 + 64366956501604 = 20992343^2 + 8022902^2 .

It is a cyclic number.

It is not a de Polignac number, because 505045421131253 - 2¹² = 505045421127157 is a prime.

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 505045421131253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505045421131259) 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, 360232111376 + ... + 360232112777.

It is an arithmetic number, because the mean of its divisors is an integer number (126441471339027).

Almost surely, 2^{505045421131253} is an apocalyptic number.

It is an amenable number.

505045421131253 is a deficient number, since it is larger than the sum of its proper divisors (720464224855).

505045421131253 is an equidigital number, since it uses as much as digits as its factorization.

505045421131253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720464224854.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 505045421131253 its reverse (352131124540505), we get a palindrome (857176545671758).

The spelling of 505045421131253 in words is "five hundred five trillion, forty-five billion, four hundred twenty-one million, one hundred thirty-one thousand, two hundred fifty-three".