31243412154321 has 16 divisors (see below), whose sum is σ = 46294330420800. Its totient is φ = 20825434183104.

The previous prime is 31243412154293. The next prime is 31243412154347. The reversal of 31243412154321 is 12345121434213.

31243412154321 is a `hidden beast` number, since 3 + 1 + 2 + 4 + 3 + 4 + 1 + 215 + 432 + 1 = 666.

It is not a de Polignac number, because 31243412154321 - 2⁷ = 31243412154193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31243412156321) 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, 97260376 + ... + 97581081.

It is an arithmetic number, because the mean of its divisors is an integer number (2893395651300).

Almost surely, 2^{31243412154321} is an apocalyptic number.

It is an amenable number.

31243412154321 is a deficient number, since it is larger than the sum of its proper divisors (15050918266479).

31243412154321 is a wasteful number, since it uses less digits than its factorization.

31243412154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194847405 (or 194847399 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 31243412154321 its reverse (12345121434213), we get a palindrome (43588533588534).

The spelling of 31243412154321 in words is "thirty-one trillion, two hundred forty-three billion, four hundred twelve million, one hundred fifty-four thousand, three hundred twenty-one".