31244626109 has 2 divisors, whose sum is σ = 31244626110. Its totient is φ = 31244626108.

The previous prime is 31244626087. The next prime is 31244626123. The reversal of 31244626109 is 90162644213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15730678084 + 15513948025 = 125422^2 + 124555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31244626109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31244626139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622313054 + 15622313055.

It is an arithmetic number, because the mean of its divisors is an integer number (15622313055).

Almost surely, 2^31244626109 is an apocalyptic number.

It is an amenable number.

31244626109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244626109 is an equidigital number, since it uses as much as digits as its factorization.

31244626109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 31244626109 in words is "thirty-one billion, two hundred forty-four million, six hundred twenty-six thousand, one hundred nine".