31123443440131 has 16 divisors (see below), whose sum is σ = 35735280791040. Its totient is φ = 26553072672000.

The previous prime is 31123443440129. The next prime is 31123443440137. The reversal of 31123443440131 is 13104434432113.

It is not a de Polignac number, because 31123443440131 - 2¹ = 31123443440129 is a prime.

It is a super-2 number, since 2×31123443440131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123443440137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3909850 + ... + 8805328.

It is an arithmetic number, because the mean of its divisors is an integer number (2233455049440).

Almost surely, 2^{31123443440131} is an apocalyptic number.

31123443440131 is a deficient number, since it is larger than the sum of its proper divisors (4611837350909).

31123443440131 is a wasteful number, since it uses less digits than its factorization.

31123443440131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899714.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 31123443440131 its reverse (13104434432113), we get a palindrome (44227877872244).

The spelling of 31123443440131 in words is "thirty-one trillion, one hundred twenty-three billion, four hundred forty-three million, four hundred forty thousand, one hundred thirty-one".