42423331 has 8 divisors (see below), whose sum is σ = 42981120. Its totient is φ = 41868552.

The previous prime is 42423307. The next prime is 42423361. The reversal of 42423331 is 13332424.

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 42423331 - 2⁷ = 42423203 is a prime.

It is a super-2 number, since 2×42423331² = 3599478026271122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42423361) 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 7 ways as a sum of consecutive naturals, for example, 42666 + ... + 43648.

It is an arithmetic number, because the mean of its divisors is an integer number (5372640).

Almost surely, 2^42423331 is an apocalyptic number.

42423331 is a deficient number, since it is larger than the sum of its proper divisors (557789).

42423331 is a wasteful number, since it uses less digits than its factorization.

42423331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

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

The square root of 42423331 is about 6513.3195069795. The cubic root of 42423331 is about 348.7666275051.

Adding to 42423331 its reverse (13332424), we get a palindrome (55755755).

The spelling of 42423331 in words is "forty-two million, four hundred twenty-three thousand, three hundred thirty-one".