31012193 has 2 divisors, whose sum is σ = 31012194. Its totient is φ = 31012192.

The previous prime is 31012187. The next prime is 31012213. The reversal of 31012193 is 39121013.

It is an a-pointer prime, because the next prime (31012213) can be obtained adding 31012193 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30824704 + 187489 = 5552^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012193 - 2⁶ = 31012129 is a prime.

It is a super-2 number, since 2×31012193² = 1923512229338498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31012133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506096 + 15506097.

It is an arithmetic number, because the mean of its divisors is an integer number (15506097).

Almost surely, 2^31012193 is an apocalyptic number.

It is an amenable number.

31012193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012193 is an equidigital number, since it uses as much as digits as its factorization.

31012193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 31012193 is about 5568.8592189065. The cubic root of 31012193 is about 314.1792457054.

The spelling of 31012193 in words is "thirty-one million, twelve thousand, one hundred ninety-three".