42004331231 has 4 divisors (see below), whose sum is σ = 42009655464. Its totient is φ = 41999007000.

The previous prime is 42004331219. The next prime is 42004331251. The reversal of 42004331231 is 13213340024.

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-42004331231 is a prime.

It is a super-2 number, since 2×42004331231² (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 = 42004331197 and 42004331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004331251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650265 + ... + 2666066.

It is an arithmetic number, because the mean of its divisors is an integer number (10502413866).

Almost surely, 2^42004331231 is an apocalyptic number.

42004331231 is a deficient number, since it is larger than the sum of its proper divisors (5324233).

42004331231 is an equidigital number, since it uses as much as digits as its factorization.

42004331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324232.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 42004331231 its reverse (13213340024), we get a palindrome (55217671255).

The spelling of 42004331231 in words is "forty-two billion, four million, three hundred thirty-one thousand, two hundred thirty-one".