51013501331213 has 4 divisors (see below), whose sum is σ = 51013517268540. Its totient is φ = 51013485393888.

The previous prime is 51013501331189. The next prime is 51013501331249. The reversal of 51013501331213 is 31213310531015.

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 30135565430569 + 20877935900644 = 5489587^2 + 4569238^2 .

It is a cyclic number.

It is not a de Polignac number, because 51013501331213 - 2¹⁴ = 51013501314829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013501331263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316018 + ... + 10186211.

It is an arithmetic number, because the mean of its divisors is an integer number (12753379317135).

Almost surely, 2^{51013501331213} is an apocalyptic number.

It is an amenable number.

51013501331213 is a deficient number, since it is larger than the sum of its proper divisors (15937327).

51013501331213 is a wasteful number, since it uses less digits than its factorization.

51013501331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15937326.

The product of its (nonzero) digits is 4050, while the sum is 29.

Adding to 51013501331213 its reverse (31213310531015), we get a palindrome (82226811862228).

The spelling of 51013501331213 in words is "fifty-one trillion, thirteen billion, five hundred one million, three hundred thirty-one thousand, two hundred thirteen".