42164233 has 6 divisors (see below), whose sum is σ = 44790686. Its totient is φ = 39683712.

The previous prime is 42164207. The next prime is 42164261. The reversal of 42164233 is 33246124.

It can be written as a sum of positive squares in 3 ways, for example, as 13520329 + 28643904 = 3677^2 + 5352^2 .

It is not a de Polignac number, because 42164233 - 2⁹ = 42163721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42164198 and 42164207.

It is not an unprimeable number, because it can be changed into a prime (42164333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72660 + ... + 73237.

Almost surely, 2^42164233 is an apocalyptic number.

It is an amenable number.

42164233 is a deficient number, since it is larger than the sum of its proper divisors (2626453).

42164233 is a wasteful number, since it uses less digits than its factorization.

42164233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145931 (or 145914 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 42164233 is about 6493.3991868666. The cubic root of 42164233 is about 348.0551532130.

The spelling of 42164233 in words is "forty-two million, one hundred sixty-four thousand, two hundred thirty-three".