31422432331 has 2 divisors, whose sum is σ = 31422432332. Its totient is φ = 31422432330.

The previous prime is 31422432311. The next prime is 31422432359. The reversal of 31422432331 is 13323422413.

It is a happy number.

It is an a-pointer prime, because the next prime (31422432359) can be obtained adding 31422432331 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31422432331 - 2¹³ = 31422424139 is a prime.

It is a super-2 number, since 2×31422432331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31422432331.

It is not a weakly prime, because it can be changed into another prime (31422432311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711216165 + 15711216166.

It is an arithmetic number, because the mean of its divisors is an integer number (15711216166).

Almost surely, 2^31422432331 is an apocalyptic number.

31422432331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422432331 is an equidigital number, since it uses as much as digits as its factorization.

31422432331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 28.

Adding to 31422432331 its reverse (13323422413), we get a palindrome (44745854744).

The spelling of 31422432331 in words is "thirty-one billion, four hundred twenty-two million, four hundred thirty-two thousand, three hundred thirty-one".