2215193081 has 2 divisors, whose sum is σ = 2215193082. Its totient is φ = 2215193080.

The previous prime is 2215193077. The next prime is 2215193093. The reversal of 2215193081 is 1803915122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1525605481 + 689587600 = 39059^2 + 26260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215193081 - 2² = 2215193077 is a prime.

It is a super-2 number, since 2×2215193081² = 9814160772220545122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2215193021) 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, 1107596540 + 1107596541.

It is an arithmetic number, because the mean of its divisors is an integer number (1107596541).

Almost surely, 2^2215193081 is an apocalyptic number.

It is an amenable number.

2215193081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215193081 is an equidigital number, since it uses as much as digits as its factorization.

2215193081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 2215193081 is about 47065.8377275918. The cubic root of 2215193081 is about 1303.5785192415.

The spelling of 2215193081 in words is "two billion, two hundred fifteen million, one hundred ninety-three thousand, eighty-one".