31434434321 has 2 divisors, whose sum is σ = 31434434322. Its totient is φ = 31434434320.

The previous prime is 31434434293. The next prime is 31434434329. The reversal of 31434434321 is 12343443413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28419216400 + 3015217921 = 168580^2 + 54911^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434434321 - 2⁶ = 31434434257 is a prime.

It is a super-2 number, since 2×31434434321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31434434329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15717217160 + 15717217161.

It is an arithmetic number, because the mean of its divisors is an integer number (15717217161).

Almost surely, 2^31434434321 is an apocalyptic number.

It is an amenable number.

31434434321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31434434321 is an equidigital number, since it uses as much as digits as its factorization.

31434434321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 32.

Adding to 31434434321 its reverse (12343443413), we get a palindrome (43777877734).

The spelling of 31434434321 in words is "thirty-one billion, four hundred thirty-four million, four hundred thirty-four thousand, three hundred twenty-one".