42112331 has 2 divisors, whose sum is σ = 42112332. Its totient is φ = 42112330.

The previous prime is 42112297. The next prime is 42112361. The reversal of 42112331 is 13321124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42112331 is a prime.

It is a super-2 number, since 2×42112331² = 3546896844507122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42112361) 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, 21056165 + 21056166.

It is an arithmetic number, because the mean of its divisors is an integer number (21056166).

Almost surely, 2^42112331 is an apocalyptic number.

42112331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42112331 is an equidigital number, since it uses as much as digits as its factorization.

42112331 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 42112331 is about 6489.4014361881. The cubic root of 42112331 is about 347.9122819165.

Adding to 42112331 its reverse (13321124), we get a palindrome (55433455).

The spelling of 42112331 in words is "forty-two million, one hundred twelve thousand, three hundred thirty-one".