100242281 has 2 divisors, whose sum is σ = 100242282. Its totient is φ = 100242280.

The previous prime is 100242227. The next prime is 100242293. The reversal of 100242281 is 182242001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95726656 + 4515625 = 9784^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 100242281 - 2¹⁰ = 100241257 is a prime.

It is a super-2 number, since 2×100242281² = 20097029800165922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100242221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50121140 + 50121141.

It is an arithmetic number, because the mean of its divisors is an integer number (50121141).

Almost surely, 2^100242281 is an apocalyptic number.

It is an amenable number.

100242281 is a deficient number, since it is larger than the sum of its proper divisors (1).

100242281 is an equidigital number, since it uses as much as digits as its factorization.

100242281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 100242281 is about 10012.1067213649. The cubic root of 100242281 is about 464.5334372943.

Adding to 100242281 its reverse (182242001), we get a palindrome (282484282).

The spelling of 100242281 in words is "one hundred million, two hundred forty-two thousand, two hundred eighty-one".