31144223111 has 8 divisors (see below), whose sum is σ = 32677872864. Its totient is φ = 29625536160.

The previous prime is 31144223063. The next prime is 31144223177. The reversal of 31144223111 is 11132244113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31144223111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144223311) 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, 3736436 + ... + 3744761.

It is an arithmetic number, because the mean of its divisors is an integer number (4084734108).

Almost surely, 2^31144223111 is an apocalyptic number.

31144223111 is a deficient number, since it is larger than the sum of its proper divisors (1533649753).

31144223111 is a wasteful number, since it uses less digits than its factorization.

31144223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481401.

The product of its digits is 576, while the sum is 23.

Adding to 31144223111 its reverse (11132244113), we get a palindrome (42276467224).

The spelling of 31144223111 in words is "thirty-one billion, one hundred forty-four million, two hundred twenty-three thousand, one hundred eleven".