42321243031 has 2 divisors, whose sum is σ = 42321243032. Its totient is φ = 42321243030.

The previous prime is 42321243001. The next prime is 42321243043. The reversal of 42321243031 is 13034212324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42321243031 is a prime.

It is a super-2 number, since 2×42321243031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42321242987 and 42321243005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42321243001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160621515 + 21160621516.

It is an arithmetic number, because the mean of its divisors is an integer number (21160621516).

Almost surely, 2^42321243031 is an apocalyptic number.

42321243031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42321243031 is an equidigital number, since it uses as much as digits as its factorization.

42321243031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42321243031 its reverse (13034212324), we get a palindrome (55355455355).

The spelling of 42321243031 in words is "forty-two billion, three hundred twenty-one million, two hundred forty-three thousand, thirty-one".