31204421429 has 2 divisors, whose sum is σ = 31204421430. Its totient is φ = 31204421428.

The previous prime is 31204421419. The next prime is 31204421447. The reversal of 31204421429 is 92412440213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30694339204 + 510082225 = 175198^2 + 22585^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204421429 - 2⁸ = 31204421173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31204421395 and 31204421404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31204421419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15602210714 + 15602210715.

It is an arithmetic number, because the mean of its divisors is an integer number (15602210715).

Almost surely, 2^31204421429 is an apocalyptic number.

It is an amenable number.

31204421429 is a deficient number, since it is larger than the sum of its proper divisors (1).

31204421429 is an equidigital number, since it uses as much as digits as its factorization.

31204421429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 31204421429 in words is "thirty-one billion, two hundred four million, four hundred twenty-one thousand, four hundred twenty-nine".