42165331 has 6 divisors (see below), whose sum is σ = 45658500. Its totient is φ = 38921688.

The previous prime is 42165323. The next prime is 42165341. The reversal of 42165331 is 13356124.

It is not a de Polignac number, because 42165331 - 2³ = 42165323 is a prime.

It is a super-2 number, since 2×42165331² = 3555830276679122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42165296 and 42165305.

It is not an unprimeable number, because it can be changed into a prime (42165341) 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 in 5 ways as a sum of consecutive naturals, for example, 124581 + ... + 124918.

It is an arithmetic number, because the mean of its divisors is an integer number (7609750).

Almost surely, 2^42165331 is an apocalyptic number.

42165331 is a deficient number, since it is larger than the sum of its proper divisors (3493169).

42165331 is a wasteful number, since it uses less digits than its factorization.

42165331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249525 (or 249512 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 42165331 is about 6493.4837337134. The cubic root of 42165331 is about 348.0581744248.

The spelling of 42165331 in words is "forty-two million, one hundred sixty-five thousand, three hundred thirty-one".