31125343349 has 2 divisors, whose sum is σ = 31125343350. Its totient is φ = 31125343348.

The previous prime is 31125343343. The next prime is 31125343357. The reversal of 31125343349 is 94334352113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23589888100 + 7535455249 = 153590^2 + 86807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31125343349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31125343343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562671674 + 15562671675.

It is an arithmetic number, because the mean of its divisors is an integer number (15562671675).

Almost surely, 2^31125343349 is an apocalyptic number.

It is an amenable number.

31125343349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31125343349 is an equidigital number, since it uses as much as digits as its factorization.

31125343349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 38.

The spelling of 31125343349 in words is "thirty-one billion, one hundred twenty-five million, three hundred forty-three thousand, three hundred forty-nine".