31012243193 has 2 divisors, whose sum is σ = 31012243194. Its totient is φ = 31012243192.

The previous prime is 31012243153. The next prime is 31012243313. The reversal of 31012243193 is 39134221013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29050816249 + 1961426944 = 170443^2 + 44288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012243193 is a prime.

It is not a weakly prime, because it can be changed into another prime (31012243153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506121596 + 15506121597.

It is an arithmetic number, because the mean of its divisors is an integer number (15506121597).

Almost surely, 2^31012243193 is an apocalyptic number.

It is an amenable number.

31012243193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012243193 is an equidigital number, since it uses as much as digits as its factorization.

31012243193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 31012243193 in words is "thirty-one billion, twelve million, two hundred forty-three thousand, one hundred ninety-three".