103561161 has 32 divisors (see below), whose sum is σ = 160247808. Its totient is φ = 58794240.

The previous prime is 103561151. The next prime is 103561181. The reversal of 103561161 is 161165301.

It is not a de Polignac number, because 103561161 - 2¹⁵ = 103528393 is a prime.

It is a super-3 number, since 3×103561161³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103561151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205636 + ... + 206138.

It is an arithmetic number, because the mean of its divisors is an integer number (5007744).

Almost surely, 2^103561161 is an apocalyptic number.

103561161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103561161 is a deficient number, since it is larger than the sum of its proper divisors (56686647).

103561161 is a wasteful number, since it uses less digits than its factorization.

103561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 103561161 is about 10176.5004299120. The cubic root of 103561161 is about 469.6045579809.

The spelling of 103561161 in words is "one hundred three million, five hundred sixty-one thousand, one hundred sixty-one".