42181151 has 4 divisors (see below), whose sum is σ = 43162152. Its totient is φ = 41200152.

The previous prime is 42181141. The next prime is 42181157. The reversal of 42181151 is 15118124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42181151 - 2¹⁴ = 42164767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42181157) 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, 490436 + ... + 490521.

It is an arithmetic number, because the mean of its divisors is an integer number (10790538).

Almost surely, 2^42181151 is an apocalyptic number.

42181151 is a deficient number, since it is larger than the sum of its proper divisors (981001).

42181151 is an equidigital number, since it uses as much as digits as its factorization.

42181151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981000.

The product of its digits is 320, while the sum is 23.

The square root of 42181151 is about 6494.7017637456. The cubic root of 42181151 is about 348.1016982685.

Adding to 42181151 its reverse (15118124), we get a palindrome (57299275).

The spelling of 42181151 in words is "forty-two million, one hundred eighty-one thousand, one hundred fifty-one".