35561 has 4 divisors (see below), whose sum is σ = 36432. Its totient is φ = 34692.

The previous prime is 35543. The next prime is 35569. The reversal of 35561 is 16553.

35561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

35561 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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.

It is a cyclic number.

It is not a de Polignac number, because 35561 - 2¹⁰ = 34537 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (35569) 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, 371 + ... + 456.

It is an arithmetic number, because the mean of its divisors is an integer number (9108).

2³⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

35561 is a deficient number, since it is larger than the sum of its proper divisors (871).

35561 is an equidigital number, since it uses as much as digits as its factorization.

35561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 450, while the sum is 20.

The square root of 35561 is about 188.5762445272. The cubic root of 35561 is about 32.8845059664.

The spelling of 35561 in words is "thirty-five thousand, five hundred sixty-one".