31144243311 has 10 divisors (see below), whose sum is σ = 46524116672. Its totient is φ = 20762828820.

The previous prime is 31144243309. The next prime is 31144243313. The reversal of 31144243311 is 11334244113.

It is an interprime number because it is at equal distance from previous prime (31144243309) and next prime (31144243313).

It is not a de Polignac number, because 31144243311 - 2¹ = 31144243309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144243313) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 192248335 + ... + 192248496.

Almost surely, 2^31144243311 is an apocalyptic number.

31144243311 is a deficient number, since it is larger than the sum of its proper divisors (15379873361).

31144243311 is an equidigital number, since it uses as much as digits as its factorization.

31144243311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384496843 (or 384496834 counting only the distinct ones).

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

Adding to 31144243311 its reverse (11334244113), we get a palindrome (42478487424).

The spelling of 31144243311 in words is "thirty-one billion, one hundred forty-four million, two hundred forty-three thousand, three hundred eleven".