31284447311 has 16 divisors (see below), whose sum is σ = 34726572384. Its totient is φ = 27995912064.

The previous prime is 31284447301. The next prime is 31284447317. The reversal of 31284447311 is 11374448213.

It is a de Polignac number, because none of the positive numbers 2^k-31284447311 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 (31284447317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15836 + ... + 250638.

It is an arithmetic number, because the mean of its divisors is an integer number (2170410774).

Almost surely, 2^31284447311 is an apocalyptic number.

31284447311 is a deficient number, since it is larger than the sum of its proper divisors (3442125073).

31284447311 is a wasteful number, since it uses less digits than its factorization.

31284447311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235130.

The product of its digits is 64512, while the sum is 38.

The spelling of 31284447311 in words is "thirty-one billion, two hundred eighty-four million, four hundred forty-seven thousand, three hundred eleven".