42323431 has 8 divisors (see below), whose sum is σ = 45217280. Its totient is φ = 39496248.

The previous prime is 42323423. The next prime is 42323459. The reversal of 42323431 is 13432324.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42323431 - 2³ = 42323423 is a prime.

It is a super-2 number, since 2×42323431² = 3582545623223522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42323471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15351 + ... + 17896.

It is an arithmetic number, because the mean of its divisors is an integer number (5652160).

Almost surely, 2^42323431 is an apocalyptic number.

42323431 is a deficient number, since it is larger than the sum of its proper divisors (2893849).

42323431 is a wasteful number, since it uses less digits than its factorization.

42323431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333.

The product of its digits is 1728, while the sum is 22.

The square root of 42323431 is about 6505.6460862854. The cubic root of 42323431 is about 348.4926495626.

Adding to 42323431 its reverse (13432324), we get a palindrome (55755755).

The spelling of 42323431 in words is "forty-two million, three hundred twenty-three thousand, four hundred thirty-one".