51435422513 has 16 divisors (see below), whose sum is σ = 54829380816. Its totient is φ = 48082944000.

The previous prime is 51435422473. The next prime is 51435422527. The reversal of 51435422513 is 31522453415.

It can be written as a sum of positive squares in 8 ways, for example, as 32244307489 + 19191115024 = 179567^2 + 138532^2 .

It is a cyclic number.

It is not a de Polignac number, because 51435422513 - 2¹⁸ = 51435160369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51435422593) 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 15 ways as a sum of consecutive naturals, for example, 3206513 + ... + 3222513.

It is an arithmetic number, because the mean of its divisors is an integer number (3426836301).

Almost surely, 2^51435422513 is an apocalyptic number.

It is an amenable number.

51435422513 is a deficient number, since it is larger than the sum of its proper divisors (3393958303).

51435422513 is a wasteful number, since it uses less digits than its factorization.

51435422513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17284.

The product of its digits is 72000, while the sum is 35.

Adding to 51435422513 its reverse (31522453415), we get a palindrome (82957875928).

The spelling of 51435422513 in words is "fifty-one billion, four hundred thirty-five million, four hundred twenty-two thousand, five hundred thirteen".