2194514281 has 2 divisors, whose sum is σ = 2194514282. Its totient is φ = 2194514280.

The previous prime is 2194514279. The next prime is 2194514291. The reversal of 2194514281 is 1824154912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223880256 + 970634025 = 34984^2 + 31155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194514281 - 2¹ = 2194514279 is a prime.

It is a super-2 number, since 2×2194514281² = 9631785859025893922, which contains 22 as substring.

Together with 2194514279, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2194514281.

It is not a weakly prime, because it can be changed into another prime (2194514251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097257140 + 1097257141.

It is an arithmetic number, because the mean of its divisors is an integer number (1097257141).

Almost surely, 2^2194514281 is an apocalyptic number.

It is an amenable number.

2194514281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194514281 is an equidigital number, since it uses as much as digits as its factorization.

2194514281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

The square root of 2194514281 is about 46845.6431378629. The cubic root of 2194514281 is about 1299.5095350987.

The spelling of 2194514281 in words is "two billion, one hundred ninety-four million, five hundred fourteen thousand, two hundred eighty-one".