31321431424113 has 4 divisors (see below), whose sum is σ = 41761908565488. Its totient is φ = 20880954282740.

The previous prime is 31321431424103. The next prime is 31321431424121. The reversal of 31321431424113 is 31142413412313.

It is a happy number.

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 31321431424113 - 2⁸ = 31321431423857 is a prime.

It is a super-2 number, since 2×31321431424113² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31321431424103) 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, 5220238570683 + ... + 5220238570688.

It is an arithmetic number, because the mean of its divisors is an integer number (10440477141372).

Almost surely, 2^{31321431424113} is an apocalyptic number.

It is an amenable number.

31321431424113 is a deficient number, since it is larger than the sum of its proper divisors (10440477141375).

31321431424113 is a wasteful number, since it uses less digits than its factorization.

31321431424113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440477141374.

The product of its digits is 20736, while the sum is 33.

Adding to 31321431424113 its reverse (31142413412313), we get a palindrome (62463844836426).

The spelling of 31321431424113 in words is "thirty-one trillion, three hundred twenty-one billion, four hundred thirty-one million, four hundred twenty-four thousand, one hundred thirteen".