31223141543 has 4 divisors (see below), whose sum is σ = 34061608968. Its totient is φ = 28384674120.

The previous prime is 31223141513. The next prime is 31223141557. The reversal of 31223141543 is 34514132213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34514132213 = 11 ⋅3137648383.

It is not a de Polignac number, because 31223141543 - 2³⁰ = 30149399719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223141513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1419233696 + ... + 1419233717.

It is an arithmetic number, because the mean of its divisors is an integer number (8515402242).

Almost surely, 2^31223141543 is an apocalyptic number.

31223141543 is a deficient number, since it is larger than the sum of its proper divisors (2838467425).

31223141543 is a wasteful number, since it uses less digits than its factorization.

31223141543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838467424.

The product of its digits is 8640, while the sum is 29.

Adding to 31223141543 its reverse (34514132213), we get a palindrome (65737273756).

The spelling of 31223141543 in words is "thirty-one billion, two hundred twenty-three million, one hundred forty-one thousand, five hundred forty-three".