51545510122031 has 4 divisors (see below), whose sum is σ = 52124673157200. Its totient is φ = 50966347086864.

The previous prime is 51545510122013. The next prime is 51545510122079. The reversal of 51545510122031 is 13022101554515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51545510122031 is a prime.

It is a super-2 number, since 2×51545510122031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51545510121982 and 51545510122000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545510122231) 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, 289581517451 + ... + 289581517628.

It is an arithmetic number, because the mean of its divisors is an integer number (13031168289300).

Almost surely, 2^{51545510122031} is an apocalyptic number.

51545510122031 is a deficient number, since it is larger than the sum of its proper divisors (579163035169).

51545510122031 is an equidigital number, since it uses as much as digits as its factorization.

51545510122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579163035168.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 51545510122031 its reverse (13022101554515), we get a palindrome (64567611676546).

The spelling of 51545510122031 in words is "fifty-one trillion, five hundred forty-five billion, five hundred ten million, one hundred twenty-two thousand, thirty-one".