42423123243 has 16 divisors (see below), whose sum is σ = 58061872512. Its totient is φ = 27536040000.

The previous prime is 42423123217. The next prime is 42423123271. The reversal of 42423123243 is 34232132424.

It is not a de Polignac number, because 42423123243 - 2¹² = 42423119147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42423123243.

It is not an unprimeable number, because it can be changed into a prime (42423123203) 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, 290833 + ... + 411618.

It is an arithmetic number, because the mean of its divisors is an integer number (3628867032).

Almost surely, 2^42423123243 is an apocalyptic number.

42423123243 is a deficient number, since it is larger than the sum of its proper divisors (15638749269).

42423123243 is a wasteful number, since it uses less digits than its factorization.

42423123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702986.

The product of its digits is 27648, while the sum is 30.

Adding to 42423123243 its reverse (34232132424), we get a palindrome (76655255667).

The spelling of 42423123243 in words is "forty-two billion, four hundred twenty-three million, one hundred twenty-three thousand, two hundred forty-three".