42113231 has 2 divisors, whose sum is σ = 42113232. Its totient is φ = 42113230.

The previous prime is 42113219. The next prime is 42113237. The reversal of 42113231 is 13231124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42113231 is a prime.

It is a super-2 number, since 2×42113231² = 3547048450518722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42113237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21056615 + 21056616.

It is an arithmetic number, because the mean of its divisors is an integer number (21056616).

Almost surely, 2^42113231 is an apocalyptic number.

42113231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42113231 is an equidigital number, since it uses as much as digits as its factorization.

42113231 is an evil number, because the sum of its binary digits is even.

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

The square root of 42113231 is about 6489.4707796553. The cubic root of 42113231 is about 347.9147603578.

Adding to 42113231 its reverse (13231124), we get a palindrome (55344355).

The spelling of 42113231 in words is "forty-two million, one hundred thirteen thousand, two hundred thirty-one".