31044311 has 2 divisors, whose sum is σ = 31044312. Its totient is φ = 31044310.

The previous prime is 31044301. The next prime is 31044313. The reversal of 31044311 is 11344013.

It is a strong prime.

It is an emirp because it is prime and its reverse (11344013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31044311 is a prime.

Together with 31044313, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31044311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31044313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15522155 + 15522156.

It is an arithmetic number, because the mean of its divisors is an integer number (15522156).

Almost surely, 2^31044311 is an apocalyptic number.

31044311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31044311 is an equidigital number, since it uses as much as digits as its factorization.

31044311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31044311 is about 5571.7421871440. The cubic root of 31044311 is about 314.2876689469.

Adding to 31044311 its reverse (11344013), we get a palindrome (42388324).

The spelling of 31044311 in words is "thirty-one million, forty-four thousand, three hundred eleven".