42243231431 has 4 divisors (see below), whose sum is σ = 42324002952. Its totient is φ = 42162459912.

The previous prime is 42243231389. The next prime is 42243231463. The reversal of 42243231431 is 13413234224.

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

It is a cyclic number.

It is not a de Polignac number, because 42243231431 - 2⁶ = 42243231367 is a prime.

It is a super-2 number, since 2×42243231431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42243231394 and 42243231403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42243231731) 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, 40384976 + ... + 40386021.

It is an arithmetic number, because the mean of its divisors is an integer number (10581000738).

Almost surely, 2^42243231431 is an apocalyptic number.

42243231431 is a deficient number, since it is larger than the sum of its proper divisors (80771521).

42243231431 is an equidigital number, since it uses as much as digits as its factorization.

42243231431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80771520.

The product of its digits is 13824, while the sum is 29.

Adding to 42243231431 its reverse (13413234224), we get a palindrome (55656465655).

The spelling of 42243231431 in words is "forty-two billion, two hundred forty-three million, two hundred thirty-one thousand, four hundred thirty-one".