103205281 has 3 divisors (see below), whose sum is σ = 103215441. Its totient is φ = 103195122.

The previous prime is 103205269. The next prime is 103205299. The reversal of 103205281 is 182502301.

The square root of 103205281 is 10159.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-103205281 is a prime.

It is a super-2 number, since 2×103205281² = 21302660052577922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103205261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5080 + ... + 15238.

It is an arithmetic number, because the mean of its divisors is an integer number (34405147).

Almost surely, 2^103205281 is an apocalyptic number.

103205281 is the 10159-th square number.

103205281 is the 5080-th centered octagonal number.

It is an amenable number.

103205281 is a deficient number, since it is larger than the sum of its proper divisors (10160).

103205281 is an frugal number, since it uses more digits than its factorization.

103205281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318 (or 10159 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The cubic root of 103205281 is about 469.0660205930.

Adding to 103205281 its reverse (182502301), we get a palindrome (285707582).

The spelling of 103205281 in words is "one hundred three million, two hundred five thousand, two hundred eighty-one".