42231132331 has 4 divisors (see below), whose sum is σ = 42279068664. Its totient is φ = 42183196000.

The previous prime is 42231132319. The next prime is 42231132337. The reversal of 42231132331 is 13323113224.

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-42231132331 is a prime.

It is a super-2 number, since 2×42231132331² (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 = 42231132296 and 42231132305.

It is not an unprimeable number, because it can be changed into a prime (42231132337) 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, 23966845 + ... + 23968606.

It is an arithmetic number, because the mean of its divisors is an integer number (10569767166).

Almost surely, 2^42231132331 is an apocalyptic number.

42231132331 is a deficient number, since it is larger than the sum of its proper divisors (47936333).

42231132331 is an equidigital number, since it uses as much as digits as its factorization.

42231132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47936332.

The product of its digits is 2592, while the sum is 25.

Adding to 42231132331 its reverse (13323113224), we get a palindrome (55554245555).

The spelling of 42231132331 in words is "forty-two billion, two hundred thirty-one million, one hundred thirty-two thousand, three hundred thirty-one".