51931146373 has 2 divisors, whose sum is σ = 51931146374. Its totient is φ = 51931146372.

The previous prime is 51931146353. The next prime is 51931146433. The reversal of 51931146373 is 37364113915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44699684929 + 7231461444 = 211423^2 + 85038^2 .

It is a cyclic number.

It is not a de Polignac number, because 51931146373 - 2⁵ = 51931146341 is a prime.

It is a super-2 number, since 2×51931146373² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51931146353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25965573186 + 25965573187.

It is an arithmetic number, because the mean of its divisors is an integer number (25965573187).

Almost surely, 2^51931146373 is an apocalyptic number.

It is an amenable number.

51931146373 is a deficient number, since it is larger than the sum of its proper divisors (1).

51931146373 is an equidigital number, since it uses as much as digits as its factorization.

51931146373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The spelling of 51931146373 in words is "fifty-one billion, nine hundred thirty-one million, one hundred forty-six thousand, three hundred seventy-three".