51931071043 has 2 divisors, whose sum is σ = 51931071044. Its totient is φ = 51931071042.

The previous prime is 51931071007. The next prime is 51931071053. The reversal of 51931071043 is 34017013915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51931071043 - 2¹⁷ = 51930939971 is a prime.

It is a super-2 number, since 2×51931071043² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51931071053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25965535521 + 25965535522.

It is an arithmetic number, because the mean of its divisors is an integer number (25965535522).

Almost surely, 2^51931071043 is an apocalyptic number.

51931071043 is a deficient number, since it is larger than the sum of its proper divisors (1).

51931071043 is an equidigital number, since it uses as much as digits as its factorization.

51931071043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

Adding to 51931071043 its reverse (34017013915), we get a palindrome (85948084958).

The spelling of 51931071043 in words is "fifty-one billion, nine hundred thirty-one million, seventy-one thousand, forty-three".