51044569431 has 4 divisors (see below), whose sum is σ = 68059425912. Its totient is φ = 34029712952.

The previous prime is 51044569423. The next prime is 51044569441. The reversal of 51044569431 is 13496544015.

It is a happy number.

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 51044569431 - 2³ = 51044569423 is a prime.

It is a super-2 number, since 2×51044569431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51044569441) 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, 8507428236 + ... + 8507428241.

It is an arithmetic number, because the mean of its divisors is an integer number (17014856478).

Almost surely, 2^51044569431 is an apocalyptic number.

51044569431 is a deficient number, since it is larger than the sum of its proper divisors (17014856481).

51044569431 is a wasteful number, since it uses less digits than its factorization.

51044569431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014856480.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 51044569431 in words is "fifty-one billion, forty-four million, five hundred sixty-nine thousand, four hundred thirty-one".