31231303130249 has 2 divisors, whose sum is σ = 31231303130250. Its totient is φ = 31231303130248.

The previous prime is 31231303130177. The next prime is 31231303130257. The reversal of 31231303130249 is 94203130313213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24150275689849 + 7081027440400 = 4914293^2 + 2661020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31231303130249 is a prime.

It is not a weakly prime, because it can be changed into another prime (31231303130549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615651565124 + 15615651565125.

It is an arithmetic number, because the mean of its divisors is an integer number (15615651565125).

Almost surely, 2^{31231303130249} is an apocalyptic number.

It is an amenable number.

31231303130249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231303130249 is an equidigital number, since it uses as much as digits as its factorization.

31231303130249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The spelling of 31231303130249 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred three million, one hundred thirty thousand, two hundred forty-nine".