42530231111 has 4 divisors (see below), whose sum is σ = 42531620400. Its totient is φ = 42528841824.

The previous prime is 42530231099. The next prime is 42530231113. The reversal of 42530231111 is 11113203524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42530231111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42530231113) 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, 647666 + ... + 710303.

It is an arithmetic number, because the mean of its divisors is an integer number (10632905100).

Almost surely, 2^42530231111 is an apocalyptic number.

42530231111 is a deficient number, since it is larger than the sum of its proper divisors (1389289).

42530231111 is a wasteful number, since it uses less digits than its factorization.

42530231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389288.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 42530231111 its reverse (11113203524), we get a palindrome (53643434635).

The spelling of 42530231111 in words is "forty-two billion, five hundred thirty million, two hundred thirty-one thousand, one hundred eleven".