31224100143 has 4 divisors (see below), whose sum is σ = 41632133528. Its totient is φ = 20816066760.

The previous prime is 31224100139. The next prime is 31224100151. The reversal of 31224100143 is 34100142213.

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

It is not a de Polignac number, because 31224100143 - 2² = 31224100139 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 (31224101143) 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, 5204016688 + ... + 5204016693.

It is an arithmetic number, because the mean of its divisors is an integer number (10408033382).

Almost surely, 2^31224100143 is an apocalyptic number.

31224100143 is a deficient number, since it is larger than the sum of its proper divisors (10408033385).

31224100143 is a wasteful number, since it uses less digits than its factorization.

31224100143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408033384.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31224100143 its reverse (34100142213), we get a palindrome (65324242356).

The spelling of 31224100143 in words is "thirty-one billion, two hundred twenty-four million, one hundred thousand, one hundred forty-three".