51636442231 has 8 divisors (see below), whose sum is σ = 56334330000. Its totient is φ = 46939165440.

The previous prime is 51636442219. The next prime is 51636442271. The reversal of 51636442231 is 13224463615.

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 51636442231 - 2²⁵ = 51602887799 is a prime.

It is a super-2 number, since 2×51636442231² (a number of 22 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 (51636442201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33895 + ... + 323143.

It is an arithmetic number, because the mean of its divisors is an integer number (7041791250).

Almost surely, 2^51636442231 is an apocalyptic number.

51636442231 is a deficient number, since it is larger than the sum of its proper divisors (4697887769).

51636442231 is a wasteful number, since it uses less digits than its factorization.

51636442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305489.

The product of its digits is 103680, while the sum is 37.

The spelling of 51636442231 in words is "fifty-one billion, six hundred thirty-six million, four hundred forty-two thousand, two hundred thirty-one".