31442124431 has 2 divisors, whose sum is σ = 31442124432. Its totient is φ = 31442124430.

The previous prime is 31442124383. The next prime is 31442124451. The reversal of 31442124431 is 13442124413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442124431 is a prime.

It is a super-2 number, since 2×31442124431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31442124394 and 31442124403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31442124451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721062215 + 15721062216.

It is an arithmetic number, because the mean of its divisors is an integer number (15721062216).

Almost surely, 2^31442124431 is an apocalyptic number.

31442124431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442124431 is an equidigital number, since it uses as much as digits as its factorization.

31442124431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

Adding to 31442124431 its reverse (13442124413), we get a palindrome (44884248844).

The spelling of 31442124431 in words is "thirty-one billion, four hundred forty-two million, one hundred twenty-four thousand, four hundred thirty-one".