335561 has 4 divisors (see below), whose sum is σ = 341124. Its totient is φ = 330000.

The previous prime is 335557. The next prime is 335567. The reversal of 335561 is 165533.

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 175561 + 160000 = 419^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 335561 - 2² = 335557 is a prime.

It is a super-2 number, since 2×335561² = 225202369442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (335567) 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, 2690 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (85281).

2³³⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

335561 is a deficient number, since it is larger than the sum of its proper divisors (5563).

335561 is an equidigital number, since it uses as much as digits as its factorization.

335561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562.

The product of its digits is 1350, while the sum is 23.

The square root of 335561 is about 579.2762726023. The cubic root of 335561 is about 69.4902424063.

The spelling of 335561 in words is "three hundred thirty-five thousand, five hundred sixty-one".