31123130241431 has 4 divisors (see below), whose sum is σ = 32953902608592. Its totient is φ = 29292357874272.

The previous prime is 31123130241409. The next prime is 31123130241517. The reversal of 31123130241431 is 13414203132113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31123130241431 - 2³⁰ = 31122056499607 is a prime.

It is a super-2 number, since 2×31123130241431² (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 = 31123130241394 and 31123130241403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123130241131) 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, 915386183555 + ... + 915386183588.

It is an arithmetic number, because the mean of its divisors is an integer number (8238475652148).

Almost surely, 2^{31123130241431} is an apocalyptic number.

31123130241431 is a deficient number, since it is larger than the sum of its proper divisors (1830772367161).

31123130241431 is a wasteful number, since it uses less digits than its factorization.

31123130241431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830772367160.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 31123130241431 its reverse (13414203132113), we get a palindrome (44537333373544).

The spelling of 31123130241431 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred thirty million, two hundred forty-one thousand, four hundred thirty-one".