51031561255063 has 8 divisors (see below), whose sum is σ = 51435686750720. Its totient is φ = 50627471731200.

The previous prime is 51031561255009. The next prime is 51031561255091. The reversal of 51031561255063 is 36055216513015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51031561255063 - 2³⁷ = 50894122301591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031561258063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6140838 + ... + 11822563.

It is an arithmetic number, because the mean of its divisors is an integer number (6429460843840).

Almost surely, 2^{51031561255063} is an apocalyptic number.

51031561255063 is a deficient number, since it is larger than the sum of its proper divisors (404125495657).

51031561255063 is a wasteful number, since it uses less digits than its factorization.

51031561255063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17985897.

The product of its (nonzero) digits is 405000, while the sum is 43.

Adding to 51031561255063 its reverse (36055216513015), we get a palindrome (87086777768078).

The spelling of 51031561255063 in words is "fifty-one trillion, thirty-one billion, five hundred sixty-one million, two hundred fifty-five thousand, sixty-three".