51356535123313 has 12 divisors (see below), whose sum is σ = 59891757376692. Its totient is φ = 43909005903840.

The previous prime is 51356535123269. The next prime is 51356535123317. The reversal of 51356535123313 is 31332153565315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37445000269824 + 13911534853489 = 6119232^2 + 3729817^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51356535123313 is a prime.

It is a super-2 number, since 2×51356535123313² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51356535123317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1319996358 + ... + 1320035263.

It is an arithmetic number, because the mean of its divisors is an integer number (4990979781391).

Almost surely, 2^{51356535123313} is an apocalyptic number.

It is an amenable number.

51356535123313 is a deficient number, since it is larger than the sum of its proper divisors (8535222253379).

51356535123313 is a wasteful number, since it uses less digits than its factorization.

51356535123313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640032032 (or 2640032025 counting only the distinct ones).

The product of its digits is 1822500, while the sum is 46.

Adding to 51356535123313 its reverse (31332153565315), we get a palindrome (82688688688628).

The spelling of 51356535123313 in words is "fifty-one trillion, three hundred fifty-six billion, five hundred thirty-five million, one hundred twenty-three thousand, three hundred thirteen".