31444169249 has 2 divisors, whose sum is σ = 31444169250. Its totient is φ = 31444169248.

The previous prime is 31444169231. The next prime is 31444169269. The reversal of 31444169249 is 94296144413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28691278225 + 2752891024 = 169385^2 + 52468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31444169249 is a prime.

It is not a weakly prime, because it can be changed into another prime (31444169269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15722084624 + 15722084625.

It is an arithmetic number, because the mean of its divisors is an integer number (15722084625).

Almost surely, 2^31444169249 is an apocalyptic number.

It is an amenable number.

31444169249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31444169249 is an equidigital number, since it uses as much as digits as its factorization.

31444169249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The spelling of 31444169249 in words is "thirty-one billion, four hundred forty-four million, one hundred sixty-nine thousand, two hundred forty-nine".