31344140240213 has 2 divisors, whose sum is σ = 31344140240214. Its totient is φ = 31344140240212.

The previous prime is 31344140240197. The next prime is 31344140240333. The reversal of 31344140240213 is 31204204144313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31176611294404 + 167528945809 = 5583602^2 + 409303^2 .

It is a cyclic number.

It is not a de Polignac number, because 31344140240213 - 2⁴ = 31344140240197 is a prime.

It is a super-4 number, since 4×31344140240213⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 31344140240213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31344140242213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672070120106 + 15672070120107.

It is an arithmetic number, because the mean of its divisors is an integer number (15672070120107).

Almost surely, 2^{31344140240213} is an apocalyptic number.

It is an amenable number.

31344140240213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344140240213 is an equidigital number, since it uses as much as digits as its factorization.

31344140240213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31344140240213 its reverse (31204204144313), we get a palindrome (62548344384526).

The spelling of 31344140240213 in words is "thirty-one trillion, three hundred forty-four billion, one hundred forty million, two hundred forty thousand, two hundred thirteen".