51338755431 has 6 divisors (see below), whose sum is σ = 74155980080. Its totient is φ = 34225836948.

The previous prime is 51338755393. The next prime is 51338755451. The reversal of 51338755431 is 13455783315.

51338755431 is a `hidden beast` number, since 5 + 1 + 3 + 38 + 75 + 543 + 1 = 666.

It is not a de Polignac number, because 51338755431 - 2⁶ = 51338755367 is a prime.

It is a super-2 number, since 2×51338755431² (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 (51338755451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2852153071 + ... + 2852153088.

Almost surely, 2^51338755431 is an apocalyptic number.

51338755431 is a deficient number, since it is larger than the sum of its proper divisors (22817224649).

51338755431 is a wasteful number, since it uses less digits than its factorization.

51338755431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704306165 (or 5704306162 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The spelling of 51338755431 in words is "fifty-one billion, three hundred thirty-eight million, seven hundred fifty-five thousand, four hundred thirty-one".