103561559 has 4 divisors (see below), whose sum is σ = 103642704. Its totient is φ = 103480416.

The previous prime is 103561547. The next prime is 103561567. The reversal of 103561559 is 955165301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955165301 = 179 ⋅5336119.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103561559 is a prime.

It is a super-3 number, since 3×103561559³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103561519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38627 + ... + 41220.

It is an arithmetic number, because the mean of its divisors is an integer number (25910676).

Almost surely, 2^103561559 is an apocalyptic number.

103561559 is a deficient number, since it is larger than the sum of its proper divisors (81145).

103561559 is an equidigital number, since it uses as much as digits as its factorization.

103561559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81144.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 103561559 is about 10176.5199847492. The cubic root of 103561559 is about 469.6051595654.

The spelling of 103561559 in words is "one hundred three million, five hundred sixty-one thousand, five hundred fifty-nine".