31224310109 has 2 divisors, whose sum is σ = 31224310110. Its totient is φ = 31224310108.

The previous prime is 31224310067. The next prime is 31224310171. The reversal of 31224310109 is 90101342213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27070120900 + 4154189209 = 164530^2 + 64453^2 .

It is an emirp because it is prime and its reverse (90101342213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31224310109 is a prime.

It is a super-3 number, since 3×31224310109³ (a number of 32 digits) contains 333 as substring.

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 (31224310199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612155054 + 15612155055.

It is an arithmetic number, because the mean of its divisors is an integer number (15612155055).

Almost surely, 2^31224310109 is an apocalyptic number.

It is an amenable number.

31224310109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31224310109 is an equidigital number, since it uses as much as digits as its factorization.

31224310109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 31224310109 in words is "thirty-one billion, two hundred twenty-four million, three hundred ten thousand, one hundred nine".