545131331 has 4 divisors (see below), whose sum is σ = 546042000. Its totient is φ = 544220664.

The previous prime is 545131313. The next prime is 545131343. The reversal of 545131331 is 133131545.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545131331 is a prime.

It is a super-2 number, since 2×545131331² = 594336336075663122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545131331.

It is not an unprimeable number, because it can be changed into a prime (545130331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454436 + ... + 455633.

It is an arithmetic number, because the mean of its divisors is an integer number (136510500).

Almost surely, 2^545131331 is an apocalyptic number.

545131331 is a deficient number, since it is larger than the sum of its proper divisors (910669).

545131331 is an equidigital number, since it uses as much as digits as its factorization.

545131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910668.

The product of its digits is 2700, while the sum is 26.

The square root of 545131331 is about 23348.0476914024. The cubic root of 545131331 is about 816.8965235169.

Adding to 545131331 its reverse (133131545), we get a palindrome (678262876).

The spelling of 545131331 in words is "five hundred forty-five million, one hundred thirty-one thousand, three hundred thirty-one".