31242043312243 has 16 divisors (see below), whose sum is σ = 32032339932960. Its totient is φ = 30461801875200.

The previous prime is 31242043312219. The next prime is 31242043312283. The reversal of 31242043312243 is 34221334024213.

It is a cyclic number.

It is not a de Polignac number, because 31242043312243 - 2²⁹ = 31241506441331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31242043312199 and 31242043312208.

It is not an unprimeable number, because it can be changed into a prime (31242043312283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051698 + ... + 7974343.

It is an arithmetic number, because the mean of its divisors is an integer number (2002021245810).

Almost surely, 2^{31242043312243} is an apocalyptic number.

31242043312243 is a deficient number, since it is larger than the sum of its proper divisors (790296620717).

31242043312243 is a wasteful number, since it uses less digits than its factorization.

31242043312243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026598.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 31242043312243 its reverse (34221334024213), we get a palindrome (65463377336456).

The spelling of 31242043312243 in words is "thirty-one trillion, two hundred forty-two billion, forty-three million, three hundred twelve thousand, two hundred forty-three".