31144222133 has 4 divisors (see below), whose sum is σ = 31144871520. Its totient is φ = 31143572748.

The previous prime is 31144222111. The next prime is 31144222141. The reversal of 31144222133 is 33122244113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31144222133 - 2¹⁴ = 31144205749 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 (31144222163) 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, 246473 + ... + 350766.

It is an arithmetic number, because the mean of its divisors is an integer number (7786217880).

Almost surely, 2^31144222133 is an apocalyptic number.

It is an amenable number.

31144222133 is a deficient number, since it is larger than the sum of its proper divisors (649387).

31144222133 is an equidigital number, since it uses as much as digits as its factorization.

31144222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649386.

The product of its digits is 3456, while the sum is 26.

Adding to 31144222133 its reverse (33122244113), we get a palindrome (64266466246).

The spelling of 31144222133 in words is "thirty-one billion, one hundred forty-four million, two hundred twenty-two thousand, one hundred thirty-three".