31144134321 has 24 divisors (see below), whose sum is σ = 45749149056. Its totient is φ = 20412354240.

The previous prime is 31144134311. The next prime is 31144134341. The reversal of 31144134321 is 12343144113.

31144134321 is a `hidden beast` number, since 311 + 4 + 4 + 1 + 343 + 2 + 1 = 666.

It is not a de Polignac number, because 31144134321 - 2²⁵ = 31110579889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31144134311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128116 + ... + 280538.

It is an arithmetic number, because the mean of its divisors is an integer number (1906214544).

Almost surely, 2^31144134321 is an apocalyptic number.

It is an amenable number.

31144134321 is a deficient number, since it is larger than the sum of its proper divisors (14605014735).

31144134321 is a wasteful number, since it uses less digits than its factorization.

31144134321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152813 (or 152810 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 31144134321 its reverse (12343144113), we get a palindrome (43487278434).

The spelling of 31144134321 in words is "thirty-one billion, one hundred forty-four million, one hundred thirty-four thousand, three hundred twenty-one".