51215324322133 has 4 divisors (see below), whose sum is σ = 51222793386060. Its totient is φ = 51207855258208.

The previous prime is 51215324322073. The next prime is 51215324322209. The reversal of 51215324322133 is 33122342351215.

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 15917490646929 + 35297833675204 = 3989673^2 + 5941198^2 .

It is a cyclic number.

It is not a de Polignac number, because 51215324322133 - 2⁹ = 51215324321621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51215324322092 and 51215324322101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51215324325133) 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, 3734521678 + ... + 3734535391.

It is an arithmetic number, because the mean of its divisors is an integer number (12805698346515).

Almost surely, 2^{51215324322133} is an apocalyptic number.

It is an amenable number.

51215324322133 is a deficient number, since it is larger than the sum of its proper divisors (7469063927).

51215324322133 is an equidigital number, since it uses as much as digits as its factorization.

51215324322133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469063926.

The product of its digits is 129600, while the sum is 37.

Adding to 51215324322133 its reverse (33122342351215), we get a palindrome (84337666673348).

The spelling of 51215324322133 in words is "fifty-one trillion, two hundred fifteen billion, three hundred twenty-four million, three hundred twenty-two thousand, one hundred thirty-three".