42331239 has 6 divisors (see below), whose sum is σ = 61145136. Its totient is φ = 28220820.

The previous prime is 42331231. The next prime is 42331277. The reversal of 42331239 is 93213324.

It is a happy number.

42331239 is a `hidden beast` number, since 423 + 3 + 1 + 239 = 666.

It is not a de Polignac number, because 42331239 - 2³ = 42331231 is a prime.

It is a super-3 number, since 3×42331239³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42331231) 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, 2351727 + ... + 2351744.

It is an arithmetic number, because the mean of its divisors is an integer number (10190856).

Almost surely, 2^42331239 is an apocalyptic number.

42331239 is a deficient number, since it is larger than the sum of its proper divisors (18813897).

42331239 is a wasteful number, since it uses less digits than its factorization.

42331239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703477 (or 4703474 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 42331239 is about 6506.2461527366. The cubic root of 42331239 is about 348.5140786956.

The spelling of 42331239 in words is "forty-two million, three hundred thirty-one thousand, two hundred thirty-nine".