31222201949 has 2 divisors, whose sum is σ = 31222201950. Its totient is φ = 31222201948.

The previous prime is 31222201939. The next prime is 31222201963. The reversal of 31222201949 is 94910222213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29448276025 + 1773925924 = 171605^2 + 42118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31222201949 is a prime.

It is a Sophie Germain 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 (31222201909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611100974 + 15611100975.

It is an arithmetic number, because the mean of its divisors is an integer number (15611100975).

Almost surely, 2^31222201949 is an apocalyptic number.

It is an amenable number.

31222201949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222201949 is an equidigital number, since it uses as much as digits as its factorization.

31222201949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 31222201949 in words is "thirty-one billion, two hundred twenty-two million, two hundred one thousand, nine hundred forty-nine".