42348181 has 2 divisors, whose sum is σ = 42348182. Its totient is φ = 42348180.

The previous prime is 42348179. The next prime is 42348191. The reversal of 42348181 is 18184324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31259281 + 11088900 = 5591^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 42348181 - 2¹ = 42348179 is a prime.

It is a super-2 number, since 2×42348181² = 3586736868017522, which contains 22 as substring.

Together with 42348179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42348161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21174090 + 21174091.

It is an arithmetic number, because the mean of its divisors is an integer number (21174091).

Almost surely, 2^42348181 is an apocalyptic number.

It is an amenable number.

42348181 is a deficient number, since it is larger than the sum of its proper divisors (1).

42348181 is an equidigital number, since it uses as much as digits as its factorization.

42348181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 42348181 is about 6507.5480021280. The cubic root of 42348181 is about 348.5605671213.

The spelling of 42348181 in words is "forty-two million, three hundred forty-eight thousand, one hundred eighty-one".