31243301013 has 4 divisors (see below), whose sum is σ = 41657734688. Its totient is φ = 20828867340.

The previous prime is 31243300987. The next prime is 31243301027. The reversal of 31243301013 is 31010334213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31010334213 = 3 ⋅10336778071.

It is a de Polignac number, because none of the positive numbers 2^k-31243301013 is a prime.

It is a super-2 number, since 2×31243301013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243301083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207216833 + ... + 5207216838.

It is an arithmetic number, because the mean of its divisors is an integer number (10414433672).

Almost surely, 2^31243301013 is an apocalyptic number.

It is an amenable number.

31243301013 is a deficient number, since it is larger than the sum of its proper divisors (10414433675).

31243301013 is a wasteful number, since it uses less digits than its factorization.

31243301013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414433674.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31243301013 its reverse (31010334213), we get a palindrome (62253635226).

The spelling of 31243301013 in words is "thirty-one billion, two hundred forty-three million, three hundred one thousand, thirteen".