51504343212031 has 4 divisors (see below), whose sum is σ = 51528998237200. Its totient is φ = 51479688186864.

The previous prime is 51504343211987. The next prime is 51504343212041. The reversal of 51504343212031 is 13021234340515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51504343212031 - 2⁴³ = 42708250189823 is a prime.

It is a super-2 number, since 2×51504343212031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504343212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12327509451 + ... + 12327513628.

It is an arithmetic number, because the mean of its divisors is an integer number (12882249559300).

Almost surely, 2^{51504343212031} is an apocalyptic number.

51504343212031 is a deficient number, since it is larger than the sum of its proper divisors (24655025169).

51504343212031 is a wasteful number, since it uses less digits than its factorization.

51504343212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24655025168.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 51504343212031 its reverse (13021234340515), we get a palindrome (64525577552546).

The spelling of 51504343212031 in words is "fifty-one trillion, five hundred four billion, three hundred forty-three million, two hundred twelve thousand, thirty-one".