42531113 has 4 divisors (see below), whose sum is σ = 42812928. Its totient is φ = 42249300.

The previous prime is 42531107. The next prime is 42531119. The reversal of 42531113 is 31113524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42531107) and next prime (42531119).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42531113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42531119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140681 + ... + 140982.

It is an arithmetic number, because the mean of its divisors is an integer number (10703232).

Almost surely, 2^42531113 is an apocalyptic number.

It is an amenable number.

42531113 is a deficient number, since it is larger than the sum of its proper divisors (281815).

42531113 is a wasteful number, since it uses less digits than its factorization.

42531113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281814.

The product of its digits is 360, while the sum is 20.

The square root of 42531113 is about 6521.5882268049. The cubic root of 42531113 is about 349.0617400754.

Adding to 42531113 its reverse (31113524), we get a palindrome (73644637).

The spelling of 42531113 in words is "forty-two million, five hundred thirty-one thousand, one hundred thirteen".