2275171981 has 2 divisors, whose sum is σ = 2275171982. Its totient is φ = 2275171980.

The previous prime is 2275171979. The next prime is 2275172027. The reversal of 2275171981 is 1891715722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1661866756 + 613305225 = 40766^2 + 24765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2275171981 - 2¹ = 2275171979 is a prime.

It is a super-2 number, since 2×2275171981² = 10352815086254928722, which contains 22 as substring.

Together with 2275171979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2275177981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1137585990 + 1137585991.

It is an arithmetic number, because the mean of its divisors is an integer number (1137585991).

Almost surely, 2^2275171981 is an apocalyptic number.

It is an amenable number.

2275171981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2275171981 is an equidigital number, since it uses as much as digits as its factorization.

2275171981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 43.

The square root of 2275171981 is about 47698.7628875215. The cubic root of 2275171981 is about 1315.2391977660.

The spelling of 2275171981 in words is "two billion, two hundred seventy-five million, one hundred seventy-one thousand, nine hundred eighty-one".