57031931443 has 2 divisors, whose sum is σ = 57031931444. Its totient is φ = 57031931442.

The previous prime is 57031931423. The next prime is 57031931549. The reversal of 57031931443 is 34413913075.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57031931443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57031931396 and 57031931405.

It is not a weakly prime, because it can be changed into another prime (57031931423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28515965721 + 28515965722.

It is an arithmetic number, because the mean of its divisors is an integer number (28515965722).

Almost surely, 2^57031931443 is an apocalyptic number.

57031931443 is a deficient number, since it is larger than the sum of its proper divisors (1).

57031931443 is an equidigital number, since it uses as much as digits as its factorization.

57031931443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 57031931443 in words is "fifty-seven billion, thirty-one million, nine hundred thirty-one thousand, four hundred forty-three".