233120561 has 4 divisors (see below), whose sum is σ = 233152752. Its totient is φ = 233088372.

The previous prime is 233120543. The next prime is 233120581. The reversal of 233120561 is 165021332.

233120561 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 233120561 - 2¹⁴ = 233104177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233120521) 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, 410 + ... + 21596.

It is an arithmetic number, because the mean of its divisors is an integer number (58288188).

Almost surely, 2^233120561 is an apocalyptic number.

It is an amenable number.

233120561 is a deficient number, since it is larger than the sum of its proper divisors (32191).

233120561 is a wasteful number, since it uses less digits than its factorization.

233120561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32190.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 233120561 is about 15268.2861186186. The cubic root of 233120561 is about 615.4510635447.

Adding to 233120561 its reverse (165021332), we get a palindrome (398141893).

The spelling of 233120561 in words is "two hundred thirty-three million, one hundred twenty thousand, five hundred sixty-one".