42433181 has 4 divisors (see below), whose sum is σ = 48495072. Its totient is φ = 36371292.

The previous prime is 42433163. The next prime is 42433189. The reversal of 42433181 is 18133424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42433181 is a prime.

It is a super-2 number, since 2×42433181² = 3601149699557522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42433181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42433189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030935 + ... + 3030948.

It is an arithmetic number, because the mean of its divisors is an integer number (12123768).

Almost surely, 2^42433181 is an apocalyptic number.

It is an amenable number.

42433181 is a deficient number, since it is larger than the sum of its proper divisors (6061891).

42433181 is an equidigital number, since it uses as much as digits as its factorization.

42433181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061890.

The product of its digits is 2304, while the sum is 26.

The square root of 42433181 is about 6514.0756059475. The cubic root of 42433181 is about 348.7936180420.

The spelling of 42433181 in words is "forty-two million, four hundred thirty-three thousand, one hundred eighty-one".