2213712181 has 2 divisors, whose sum is σ = 2213712182. Its totient is φ = 2213712180.

The previous prime is 2213712133. The next prime is 2213712191. The reversal of 2213712181 is 1812173122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1208188081 + 1005524100 = 34759^2 + 31710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2213712181 is a prime.

It is a super-2 number, since 2×2213712181² = 9801043240615553522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213712131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106856090 + 1106856091.

It is an arithmetic number, because the mean of its divisors is an integer number (1106856091).

Almost surely, 2^2213712181 is an apocalyptic number.

It is an amenable number.

2213712181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213712181 is an equidigital number, since it uses as much as digits as its factorization.

2213712181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 2213712181 is about 47050.1028798025. The cubic root of 2213712181 is about 1303.2879652199.

The spelling of 2213712181 in words is "two billion, two hundred thirteen million, seven hundred twelve thousand, one hundred eighty-one".