51320342133013 has 8 divisors (see below), whose sum is σ = 51588088251480. Its totient is φ = 51052669113600.

The previous prime is 51320342132999. The next prime is 51320342133019. The reversal of 51320342133013 is 31033124302315.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38404383054129 + 12915959078884 = 6197127^2 + 3593878^2 .

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 51320342133013 - 2⁵ = 51320342132981 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 (51320342133019) 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, 16866688 + ... + 19675513.

It is an arithmetic number, because the mean of its divisors is an integer number (6448511031435).

Almost surely, 2^{51320342133013} is an apocalyptic number.

It is an amenable number.

51320342133013 is a deficient number, since it is larger than the sum of its proper divisors (267746118467).

51320342133013 is a wasteful number, since it uses less digits than its factorization.

51320342133013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36549527.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 51320342133013 its reverse (31033124302315), we get a palindrome (82353466435328).

The spelling of 51320342133013 in words is "fifty-one trillion, three hundred twenty billion, three hundred forty-two million, one hundred thirty-three thousand, thirteen".