5115452312521 has 4 divisors (see below), whose sum is σ = 5116331111044. Its totient is φ = 5114573514000.

The previous prime is 5115452312513. The next prime is 5115452312527. The reversal of 5115452312521 is 1252132545115.

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 4266852084496 + 848600228025 = 2065636^2 + 921195^2 .

It is a cyclic number.

It is not a de Polignac number, because 5115452312521 - 2³ = 5115452312513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5115452312527) 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, 439390530 + ... + 439402171.

It is an arithmetic number, because the mean of its divisors is an integer number (1279082777761).

Almost surely, 2^{5115452312521} is an apocalyptic number.

It is an amenable number.

5115452312521 is a deficient number, since it is larger than the sum of its proper divisors (878798523).

5115452312521 is an equidigital number, since it uses as much as digits as its factorization.

5115452312521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878798522.

The product of its digits is 60000, while the sum is 37.

Adding to 5115452312521 its reverse (1252132545115), we get a palindrome (6367584857636).

The spelling of 5115452312521 in words is "five trillion, one hundred fifteen billion, four hundred fifty-two million, three hundred twelve thousand, five hundred twenty-one".