505313142321551 has 8 divisors (see below), whose sum is σ = 535158411981984. Its totient is φ = 475481313457920.

The previous prime is 505313142321521. The next prime is 505313142321553. The reversal of 505313142321551 is 155123241313505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505313142321551 - 2⁴² = 500915095810447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505313142321499 and 505313142321508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505313142321553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360121790 + ... + 3360272171.

It is an arithmetic number, because the mean of its divisors is an integer number (66894801497748).

Almost surely, 2^{505313142321551} is an apocalyptic number.

505313142321551 is a deficient number, since it is larger than the sum of its proper divisors (29845269660433).

505313142321551 is a wasteful number, since it uses less digits than its factorization.

505313142321551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720398401.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 505313142321551 in words is "five hundred five trillion, three hundred thirteen billion, one hundred forty-two million, three hundred twenty-one thousand, five hundred fifty-one".