31241442013 has 4 divisors (see below), whose sum is σ = 31544757088. Its totient is φ = 30938126940.

The previous prime is 31241441983. The next prime is 31241442049. The reversal of 31241442013 is 31024414213.

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: 31024414213 = 13 ⋅2386493401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31241442013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241442073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151657383 + ... + 151657588.

It is an arithmetic number, because the mean of its divisors is an integer number (7886189272).

Almost surely, 2^31241442013 is an apocalyptic number.

It is an amenable number.

31241442013 is a deficient number, since it is larger than the sum of its proper divisors (303315075).

31241442013 is a wasteful number, since it uses less digits than its factorization.

31241442013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303315074.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31241442013 its reverse (31024414213), we get a palindrome (62265856226).

The spelling of 31241442013 in words is "thirty-one billion, two hundred forty-one million, four hundred forty-two thousand, thirteen".