31344242249 has 2 divisors, whose sum is σ = 31344242250. Its totient is φ = 31344242248.

The previous prime is 31344242203. The next prime is 31344242287. The reversal of 31344242249 is 94224244313.

It is a happy number.

It is an a-pointer prime, because the next prime (31344242287) can be obtained adding 31344242249 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30960865849 + 383376400 = 175957^2 + 19580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31344242249 is a prime.

It is not a weakly prime, because it can be changed into another prime (31344244249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672121124 + 15672121125.

It is an arithmetic number, because the mean of its divisors is an integer number (15672121125).

Almost surely, 2^31344242249 is an apocalyptic number.

It is an amenable number.

31344242249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344242249 is an equidigital number, since it uses as much as digits as its factorization.

31344242249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 38.

The spelling of 31344242249 in words is "thirty-one billion, three hundred forty-four million, two hundred forty-two thousand, two hundred forty-nine".