103633561 has 4 divisors (see below), whose sum is σ = 108139392. Its totient is φ = 99127732.

The previous prime is 103633549. The next prime is 103633567. The reversal of 103633561 is 165336301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165336301 = 13 ⋅12718177.

It is a cyclic number.

It is not a de Polignac number, because 103633561 - 2¹³ = 103625369 is a prime.

It is a super-3 number, since 3×103633561³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103633567) 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 in 3 ways as a sum of consecutive naturals, for example, 2252881 + ... + 2252926.

It is an arithmetic number, because the mean of its divisors is an integer number (27034848).

Almost surely, 2^103633561 is an apocalyptic number.

It is an amenable number.

103633561 is a deficient number, since it is larger than the sum of its proper divisors (4505831).

103633561 is an equidigital number, since it uses as much as digits as its factorization.

103633561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505830.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 103633561 is about 10180.0570234159. The cubic root of 103633561 is about 469.7139665974.

Adding to 103633561 its reverse (165336301), we get a palindrome (268969862).

It can be divided in two parts, 10363 and 3561, that added together give a square (13924 = 118²).

The spelling of 103633561 in words is "one hundred three million, six hundred thirty-three thousand, five hundred sixty-one".