42545231111 has 4 divisors (see below), whose sum is σ = 44395023792. Its totient is φ = 40695438432.

The previous prime is 42545231093. The next prime is 42545231137. The reversal of 42545231111 is 11113254524.

It is a happy number.

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-42545231111 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 (42545231171) 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, 924896306 + ... + 924896351.

It is an arithmetic number, because the mean of its divisors is an integer number (11098755948).

Almost surely, 2^42545231111 is an apocalyptic number.

42545231111 is a deficient number, since it is larger than the sum of its proper divisors (1849792681).

42545231111 is a wasteful number, since it uses less digits than its factorization.

42545231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849792680.

The product of its digits is 4800, while the sum is 29.

Adding to 42545231111 its reverse (11113254524), we get a palindrome (53658485635).

The spelling of 42545231111 in words is "forty-two billion, five hundred forty-five million, two hundred thirty-one thousand, one hundred eleven".