31332230213 has 2 divisors, whose sum is σ = 31332230214. Its totient is φ = 31332230212.

The previous prime is 31332230183. The next prime is 31332230219. The reversal of 31332230213 is 31203223313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16666293604 + 14665936609 = 129098^2 + 121103^2 .

It is a cyclic number.

It is not a de Polignac number, because 31332230213 - 2²⁴ = 31315452997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31332230219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666115106 + 15666115107.

It is an arithmetic number, because the mean of its divisors is an integer number (15666115107).

Almost surely, 2^31332230213 is an apocalyptic number.

It is an amenable number.

31332230213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31332230213 is an equidigital number, since it uses as much as digits as its factorization.

31332230213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31332230213 its reverse (31203223313), we get a palindrome (62535453526).

The spelling of 31332230213 in words is "thirty-one billion, three hundred thirty-two million, two hundred thirty thousand, two hundred thirteen".