31043313113431 has 16 divisors (see below), whose sum is σ = 31542921123840. Its totient is φ = 30545471547360.

The previous prime is 31043313113419. The next prime is 31043313113467. The reversal of 31043313113431 is 13431131334013.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31043313113431 - 2²⁹ = 31042776242519 is a prime.

It is a super-2 number, since 2×31043313113431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31043313113393 and 31043313113402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31043313113831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130767000 + ... + 131004178.

It is an arithmetic number, because the mean of its divisors is an integer number (1971432570240).

Almost surely, 2^{31043313113431} is an apocalyptic number.

31043313113431 is a deficient number, since it is larger than the sum of its proper divisors (499608010409).

31043313113431 is a wasteful number, since it uses less digits than its factorization.

31043313113431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240894.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 31043313113431 its reverse (13431131334013), we get a palindrome (44474444447444).

The spelling of 31043313113431 in words is "thirty-one trillion, forty-three billion, three hundred thirteen million, one hundred thirteen thousand, four hundred thirty-one".