545311 has 4 divisors (see below), whose sum is σ = 587272. Its totient is φ = 503352.

The previous prime is 545291. The next prime is 545329. The reversal of 545311 is 113545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113545 = 5 ⋅22709.

It is a cyclic number.

It is not a de Polignac number, because 545311 - 2¹⁵ = 512543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545371) 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, 20961 + ... + 20986.

It is an arithmetic number, because the mean of its divisors is an integer number (146818).

2⁵⁴⁵³¹¹ is an apocalyptic number.

545311 is a deficient number, since it is larger than the sum of its proper divisors (41961).

545311 is a wasteful number, since it uses less digits than its factorization.

545311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41960.

The product of its digits is 300, while the sum is 19.

The square root of 545311 is about 738.4517587493. The cubic root of 545311 is about 81.6986260217.

Adding to 545311 its reverse (113545), we get a palindrome (658856).

The spelling of 545311 in words is "five hundred forty-five thousand, three hundred eleven".