42424431 has 16 divisors (see below), whose sum is σ = 65376000. Its totient is φ = 23969088.

The previous prime is 42424429. The next prime is 42424451. The reversal of 42424431 is 13442424.

It is a happy number.

It is not a de Polignac number, because 42424431 - 2¹ = 42424429 is a prime.

It is a super-2 number, since 2×42424431² = 3599664691347522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42424411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9481 + ... + 13218.

It is an arithmetic number, because the mean of its divisors is an integer number (4086000).

Almost surely, 2^42424431 is an apocalyptic number.

42424431 is a deficient number, since it is larger than the sum of its proper divisors (22951569).

42424431 is a wasteful number, since it uses less digits than its factorization.

42424431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22798.

The product of its digits is 3072, while the sum is 24.

The square root of 42424431 is about 6513.4039487813. The cubic root of 42424431 is about 348.7696418839.

Adding to 42424431 its reverse (13442424), we get a palindrome (55866855).

The spelling of 42424431 in words is "forty-two million, four hundred twenty-four thousand, four hundred thirty-one".