31843603457 has 2 divisors, whose sum is σ = 31843603458. Its totient is φ = 31843603456.

The previous prime is 31843603453. The next prime is 31843603469. The reversal of 31843603457 is 75430634813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30974592016 + 869011441 = 175996^2 + 29479^2 .

It is a cyclic number.

It is not a de Polignac number, because 31843603457 - 2² = 31843603453 is a prime.

It is a super-2 number, since 2×31843603457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31843603453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15921801728 + 15921801729.

It is an arithmetic number, because the mean of its divisors is an integer number (15921801729).

Almost surely, 2^31843603457 is an apocalyptic number.

It is an amenable number.

31843603457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31843603457 is an equidigital number, since it uses as much as digits as its factorization.

31843603457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 31843603457 in words is "thirty-one billion, eight hundred forty-three million, six hundred three thousand, four hundred fifty-seven".