31224434402013 has 4 divisors (see below), whose sum is σ = 41632579202688. Its totient is φ = 20816289601340.

The previous prime is 31224434401991. The next prime is 31224434402017. The reversal of 31224434402013 is 31020443442213.

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.

It is a cyclic number.

It is not a de Polignac number, because 31224434402013 - 2⁶ = 31224434401949 is a prime.

It is a super-2 number, since 2×31224434402013² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224434402017) 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, 5204072400333 + ... + 5204072400338.

It is an arithmetic number, because the mean of its divisors is an integer number (10408144800672).

Almost surely, 2^{31224434402013} is an apocalyptic number.

It is an amenable number.

31224434402013 is a deficient number, since it is larger than the sum of its proper divisors (10408144800675).

31224434402013 is a wasteful number, since it uses less digits than its factorization.

31224434402013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10408144800674.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 31224434402013 its reverse (31020443442213), we get a palindrome (62244877844226).

The spelling of 31224434402013 in words is "thirty-one trillion, two hundred twenty-four billion, four hundred thirty-four million, four hundred two thousand, thirteen".