193561 has 4 divisors (see below), whose sum is σ = 198324. Its totient is φ = 188800.

The previous prime is 193559. The next prime is 193573. The reversal of 193561 is 165391.

193561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48400 + 145161 = 220^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 193561 - 2¹ = 193559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193541) 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, 2320 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (49581).

2¹⁹³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

193561 is a deficient number, since it is larger than the sum of its proper divisors (4763).

193561 is an equidigital number, since it uses as much as digits as its factorization.

193561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762.

The product of its digits is 810, while the sum is 25.

The square root of 193561 is about 439.9556795860. The cubic root of 193561 is about 57.8459048727.

The spelling of 193561 in words is "one hundred ninety-three thousand, five hundred sixty-one".