31240322101243 has 4 divisors (see below), whose sum is σ = 31355600042848. Its totient is φ = 31125044159640.

The previous prime is 31240322101213. The next prime is 31240322101271. The reversal of 31240322101243 is 34210122304213.

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 31240322101243 - 2³⁷ = 31102883147771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31240322101213) 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, 57638970396 + ... + 57638970937.

It is an arithmetic number, because the mean of its divisors is an integer number (7838900010712).

Almost surely, 2^{31240322101243} is an apocalyptic number.

31240322101243 is a deficient number, since it is larger than the sum of its proper divisors (115277941605).

31240322101243 is a wasteful number, since it uses less digits than its factorization.

31240322101243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115277941604.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31240322101243 its reverse (34210122304213), we get a palindrome (65450444405456).

The spelling of 31240322101243 in words is "thirty-one trillion, two hundred forty billion, three hundred twenty-two million, one hundred one thousand, two hundred forty-three".