31442131121431 has 8 divisors (see below), whose sum is σ = 31448021885280. Its totient is φ = 31436240787072.

The previous prime is 31442131121399. The next prime is 31442131121441. The reversal of 31442131121431 is 13412113124413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31442131121431 - 2⁵ = 31442131121399 is a prime.

It is a super-2 number, since 2×31442131121431² (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 = 31442131121393 and 31442131121402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442131121441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171168171 + ... + 171351763.

It is an arithmetic number, because the mean of its divisors is an integer number (3931002735660).

Almost surely, 2^{31442131121431} is an apocalyptic number.

31442131121431 is a deficient number, since it is larger than the sum of its proper divisors (5890763849).

31442131121431 is a wasteful number, since it uses less digits than its factorization.

31442131121431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214745.

The product of its digits is 6912, while the sum is 31.

Adding to 31442131121431 its reverse (13412113124413), we get a palindrome (44854244245844).

The spelling of 31442131121431 in words is "thirty-one trillion, four hundred forty-two billion, one hundred thirty-one million, one hundred twenty-one thousand, four hundred thirty-one".