42240231 has 16 divisors (see below), whose sum is σ = 68267520. Its totient is φ = 25599960.

The previous prime is 42240221. The next prime is 42240271. The reversal of 42240231 is 13204224.

It is not a de Polignac number, because 42240231 - 2⁷ = 42240103 is a prime.

It is a super-2 number, since 2×42240231² = 3568474229866722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240221) 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 15 ways as a sum of consecutive naturals, for example, 70815 + ... + 71408.

It is an arithmetic number, because the mean of its divisors is an integer number (4266720).

Almost surely, 2^42240231 is an apocalyptic number.

42240231 is a deficient number, since it is larger than the sum of its proper divisors (26027289).

42240231 is a wasteful number, since it uses less digits than its factorization.

42240231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142243 (or 142237 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42240231 is about 6499.2484950185. The cubic root of 42240231 is about 348.2641425011.

Adding to 42240231 its reverse (13204224), we get a palindrome (55444455).

The spelling of 42240231 in words is "forty-two million, two hundred forty thousand, two hundred thirty-one".