545331 has 4 divisors (see below), whose sum is σ = 727112. Its totient is φ = 363552.

The previous prime is 545329. The next prime is 545371. The reversal of 545331 is 133545.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 545331 - 2¹ = 545329 is a prime.

It is a super-2 number, since 2×545331² = 594771799122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545298 and 545307.

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, 90886 + ... + 90891.

It is an arithmetic number, because the mean of its divisors is an integer number (181778).

2⁵⁴⁵³³¹ is an apocalyptic number.

545331 is a deficient number, since it is larger than the sum of its proper divisors (181781).

545331 is a wasteful number, since it uses less digits than its factorization.

545331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181780.

The product of its digits is 900, while the sum is 21.

The square root of 545331 is about 738.4653004712. The cubic root of 545331 is about 81.6996248111.

Adding to 545331 its reverse (133545), we get a palindrome (678876).

The spelling of 545331 in words is "five hundred forty-five thousand, three hundred thirty-one".