31230313442243 has 4 divisors (see below), whose sum is σ = 31404784467240. Its totient is φ = 31055842417248.

The previous prime is 31230313442173. The next prime is 31230313442297. The reversal of 31230313442243 is 34224431303213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31230313442243 - 2¹² = 31230313438147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31230313442543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87235512230 + ... + 87235512587.

It is an arithmetic number, because the mean of its divisors is an integer number (7851196116810).

Almost surely, 2^{31230313442243} is an apocalyptic number.

31230313442243 is a deficient number, since it is larger than the sum of its proper divisors (174471024997).

31230313442243 is a wasteful number, since it uses less digits than its factorization.

31230313442243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174471024996.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 31230313442243 its reverse (34224431303213), we get a palindrome (65454744745456).

The spelling of 31230313442243 in words is "thirty-one trillion, two hundred thirty billion, three hundred thirteen million, four hundred forty-two thousand, two hundred forty-three".