42231311 has 2 divisors, whose sum is σ = 42231312. Its totient is φ = 42231310.

The previous prime is 42231283. The next prime is 42231323. The reversal of 42231311 is 11313224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42231311 is a prime.

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 42231311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42201311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115655 + 21115656.

It is an arithmetic number, because the mean of its divisors is an integer number (21115656).

Almost surely, 2^42231311 is an apocalyptic number.

42231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

42231311 is an equidigital number, since it uses as much as digits as its factorization.

42231311 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42231311 is about 6498.5622256004. The cubic root of 42231311 is about 348.2396261039.

Adding to 42231311 its reverse (11313224), we get a palindrome (53544535).

The spelling of 42231311 in words is "forty-two million, two hundred thirty-one thousand, three hundred eleven".