51931146433 has 2 divisors, whose sum is σ = 51931146434. Its totient is φ = 51931146432.

The previous prime is 51931146373. The next prime is 51931146437. The reversal of 51931146433 is 33464113915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38178424449 + 13752721984 = 195393^2 + 117272^2 .

It is a cyclic number.

It is not a de Polignac number, because 51931146433 - 2¹⁷ = 51931015361 is a prime.

It is not a weakly prime, because it can be changed into another prime (51931146437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25965573216 + 25965573217.

It is an arithmetic number, because the mean of its divisors is an integer number (25965573217).

Almost surely, 2^51931146433 is an apocalyptic number.

It is an amenable number.

51931146433 is a deficient number, since it is larger than the sum of its proper divisors (1).

51931146433 is an equidigital number, since it uses as much as digits as its factorization.

51931146433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The spelling of 51931146433 in words is "fifty-one billion, nine hundred thirty-one million, one hundred forty-six thousand, four hundred thirty-three".