31230334021373 has 2 divisors, whose sum is σ = 31230334021374. Its totient is φ = 31230334021372.

The previous prime is 31230334021361. The next prime is 31230334021429. The reversal of 31230334021373 is 37312043303213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28287537871609 + 2942796149764 = 5318603^2 + 1715458^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230334021373 - 2⁴ = 31230334021357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230334021273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615167010686 + 15615167010687.

It is an arithmetic number, because the mean of its divisors is an integer number (15615167010687).

Almost surely, 2^{31230334021373} is an apocalyptic number.

It is an amenable number.

31230334021373 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230334021373 is an equidigital number, since it uses as much as digits as its factorization.

31230334021373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 35.

Adding to 31230334021373 its reverse (37312043303213), we get a palindrome (68542377324586).

The spelling of 31230334021373 in words is "thirty-one trillion, two hundred thirty billion, three hundred thirty-four million, twenty-one thousand, three hundred seventy-three".