42524431 has 8 divisors (see below), whose sum is σ = 43398144. Its totient is φ = 41657880.

The previous prime is 42524407. The next prime is 42524441. The reversal of 42524431 is 13442524.

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 42524431 - 2⁵ = 42524399 is a prime.

It is a super-2 number, since 2×42524431² = 3616654463747522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42524396 and 42524405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42524441) 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, 11136 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (5424768).

Almost surely, 2^42524431 is an apocalyptic number.

42524431 is a deficient number, since it is larger than the sum of its proper divisors (873713).

42524431 is a wasteful number, since it uses less digits than its factorization.

42524431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581.

The product of its digits is 3840, while the sum is 25.

The square root of 42524431 is about 6521.0759081612. The cubic root of 42524431 is about 349.0434589275.

Adding to 42524431 its reverse (13442524), we get a palindrome (55966955).

The spelling of 42524431 in words is "forty-two million, five hundred twenty-four thousand, four hundred thirty-one".