31125074947 has 2 divisors, whose sum is σ = 31125074948. Its totient is φ = 31125074946.

The previous prime is 31125074923. The next prime is 31125074993. The reversal of 31125074947 is 74947052113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31125074947 - 2³¹ = 28977591299 is a prime.

It is not a weakly prime, because it can be changed into another prime (31125074647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562537473 + 15562537474.

It is an arithmetic number, because the mean of its divisors is an integer number (15562537474).

Almost surely, 2^31125074947 is an apocalyptic number.

31125074947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31125074947 is an equidigital number, since it uses as much as digits as its factorization.

31125074947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 31125074947 in words is "thirty-one billion, one hundred twenty-five million, seventy-four thousand, nine hundred forty-seven".