103005561 has 16 divisors (see below), whose sum is σ = 139329344. Its totient is φ = 67682304.

The previous prime is 103005559. The next prime is 103005577. The reversal of 103005561 is 165500301.

It is a happy number.

It is not a de Polignac number, because 103005561 - 2¹ = 103005559 is a prime.

It is a super-2 number, since 2×103005561² = 21220291193849442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103005761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88761 + ... + 89913.

It is an arithmetic number, because the mean of its divisors is an integer number (8708084).

Almost surely, 2^103005561 is an apocalyptic number.

It is an amenable number.

103005561 is a deficient number, since it is larger than the sum of its proper divisors (36323783).

103005561 is a wasteful number, since it uses less digits than its factorization.

103005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 103005561 is about 10149.1655322002. The cubic root of 103005561 is about 468.7632506832.

Adding to 103005561 its reverse (165500301), we get a palindrome (268505862).

The spelling of 103005561 in words is "one hundred three million, five thousand, five hundred sixty-one".