31224042149 has 2 divisors, whose sum is σ = 31224042150. Its totient is φ = 31224042148.

The previous prime is 31224042133. The next prime is 31224042151. The reversal of 31224042149 is 94124042213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19232697124 + 11991345025 = 138682^2 + 109505^2 .

It is a cyclic number.

It is not a de Polignac number, because 31224042149 - 2⁴ = 31224042133 is a prime.

It is a Sophie Germain prime.

Together with 31224042151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31224042049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612021074 + 15612021075.

It is an arithmetic number, because the mean of its divisors is an integer number (15612021075).

Almost surely, 2^31224042149 is an apocalyptic number.

It is an amenable number.

31224042149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31224042149 is an equidigital number, since it uses as much as digits as its factorization.

31224042149 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 31224042149 in words is "thirty-one billion, two hundred twenty-four million, forty-two thousand, one hundred forty-nine".