51127636221631 has 8 divisors (see below), whose sum is σ = 51474567781728. Its totient is φ = 50781874752000.

The previous prime is 51127636221503. The next prime is 51127636221653. The reversal of 51127636221631 is 13612263672115.

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 51127636221631 - 2⁷ = 51127636221503 is a prime.

It is a super-2 number, since 2×51127636221631² (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 (51127636221031) 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, 292434930 + ... + 292609711.

It is an arithmetic number, because the mean of its divisors is an integer number (6434320972716).

Almost surely, 2^{51127636221631} is an apocalyptic number.

51127636221631 is a deficient number, since it is larger than the sum of its proper divisors (346931560097).

51127636221631 is a wasteful number, since it uses less digits than its factorization.

51127636221631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585045233.

The product of its digits is 544320, while the sum is 46.

Adding to 51127636221631 its reverse (13612263672115), we get a palindrome (64739899893746).

The spelling of 51127636221631 in words is "fifty-one trillion, one hundred twenty-seven billion, six hundred thirty-six million, two hundred twenty-one thousand, six hundred thirty-one".