51542212130513 has 4 divisors (see below), whose sum is σ = 55506997679028. Its totient is φ = 47577426582000.

The previous prime is 51542212130483. The next prime is 51542212130533. The reversal of 51542212130513 is 31503121224515.

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 16862750919184 + 34679461211329 = 4106428^2 + 5888927^2 .

It is a cyclic number.

It is not a de Polignac number, because 51542212130513 - 2⁸ = 51542212130257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51542212130533) 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, 1982392774238 + ... + 1982392774263.

It is an arithmetic number, because the mean of its divisors is an integer number (13876749419757).

Almost surely, 2^{51542212130513} is an apocalyptic number.

It is an amenable number.

51542212130513 is a deficient number, since it is larger than the sum of its proper divisors (3964785548515).

51542212130513 is a wasteful number, since it uses less digits than its factorization.

51542212130513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964785548514.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 51542212130513 in words is "fifty-one trillion, five hundred forty-two billion, two hundred twelve million, one hundred thirty thousand, five hundred thirteen".