51931039 has 8 divisors (see below), whose sum is σ = 55086048. Its totient is φ = 48787200.

The previous prime is 51931037. The next prime is 51931063. The reversal of 51931039 is 93013915.

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 51931039 - 2¹ = 51931037 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51931039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51931037) 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, 8014 + ... + 12964.

It is an arithmetic number, because the mean of its divisors is an integer number (6885756).

Almost surely, 2^51931039 is an apocalyptic number.

51931039 is a deficient number, since it is larger than the sum of its proper divisors (3155009).

51931039 is a wasteful number, since it uses less digits than its factorization.

51931039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5585.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 51931039 is about 7206.3193795446. The cubic root of 51931039 is about 373.0860441622.

The spelling of 51931039 in words is "fifty-one million, nine hundred thirty-one thousand, thirty-nine".