102181427 has 2 divisors, whose sum is σ = 102181428. Its totient is φ = 102181426.

The previous prime is 102181423. The next prime is 102181447. The reversal of 102181427 is 724181201.

It is a weak prime.

It is an emirp because it is prime and its reverse (724181201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102181427 - 2² = 102181423 is a prime.

It is a super-3 number, since 3×102181427³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102181396 and 102181405.

It is not a weakly prime, because it can be changed into another prime (102181421) 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, 51090713 + 51090714.

It is an arithmetic number, because the mean of its divisors is an integer number (51090714).

Almost surely, 2^102181427 is an apocalyptic number.

102181427 is a deficient number, since it is larger than the sum of its proper divisors (1).

102181427 is an equidigital number, since it uses as much as digits as its factorization.

102181427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 102181427 is about 10108.4829227733. The cubic root of 102181427 is about 467.5097305113.

The spelling of 102181427 in words is "one hundred two million, one hundred eighty-one thousand, four hundred twenty-seven".