2185297031 has 2 divisors, whose sum is σ = 2185297032. Its totient is φ = 2185297030.

The previous prime is 2185297019. The next prime is 2185297061. The reversal of 2185297031 is 1307925812.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2185297031 is a prime.

It is a super-2 number, since 2×2185297031² = 9551046227394829922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185297061) 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, 1092648515 + 1092648516.

It is an arithmetic number, because the mean of its divisors is an integer number (1092648516).

Almost surely, 2^2185297031 is an apocalyptic number.

2185297031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185297031 is an equidigital number, since it uses as much as digits as its factorization.

2185297031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 2185297031 is about 46747.1606731361. The cubic root of 2185297031 is about 1297.6876113439.

The spelling of 2185297031 in words is "two billion, one hundred eighty-five million, two hundred ninety-seven thousand, thirty-one".