31852845397 has 2 divisors, whose sum is σ = 31852845398. Its totient is φ = 31852845396.

The previous prime is 31852845389. The next prime is 31852845439. The reversal of 31852845397 is 79354825813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31527908721 + 324936676 = 177561^2 + 18026^2 .

It is a cyclic number.

It is not a de Polignac number, because 31852845397 - 2³ = 31852845389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31852849397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15926422698 + 15926422699.

It is an arithmetic number, because the mean of its divisors is an integer number (15926422699).

Almost surely, 2^31852845397 is an apocalyptic number.

It is an amenable number.

31852845397 is a deficient number, since it is larger than the sum of its proper divisors (1).

31852845397 is an equidigital number, since it uses as much as digits as its factorization.

31852845397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 55.

The spelling of 31852845397 in words is "thirty-one billion, eight hundred fifty-two million, eight hundred forty-five thousand, three hundred ninety-seven".