353561 has 4 divisors (see below), whose sum is σ = 380772. Its totient is φ = 326352.

The previous prime is 353557. The next prime is 353567. The reversal of 353561 is 165353.

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 118336 + 235225 = 344^2 + 485^2 .

It is not a de Polignac number, because 353561 - 2² = 353557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (353567) 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, 13586 + ... + 13611.

It is an arithmetic number, because the mean of its divisors is an integer number (95193).

2³⁵³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

353561 is a deficient number, since it is larger than the sum of its proper divisors (27211).

353561 is a wasteful number, since it uses less digits than its factorization.

353561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27210.

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

The square root of 353561 is about 594.6099561898. The cubic root of 353561 is about 70.7111854088.

The spelling of 353561 in words is "three hundred fifty-three thousand, five hundred sixty-one".