545142231 has 20 divisors (see below), whose sum is σ = 822755472. Its totient is φ = 359676288.

The previous prime is 545142211. The next prime is 545142233. The reversal of 545142231 is 132241545.

It is a de Polignac number, because none of the positive numbers 2^k-545142231 is a prime.

It is a super-3 number, since 3×545142231³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 545142195 and 545142204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545142233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26835 + ... + 42548.

Almost surely, 2^545142231 is an apocalyptic number.

545142231 is a deficient number, since it is larger than the sum of its proper divisors (277613241).

545142231 is an equidigital number, since it uses as much as digits as its factorization.

545142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69492 (or 69483 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 545142231 is about 23348.2811144632. The cubic root of 545142231 is about 816.9019681454.

Adding to 545142231 its reverse (132241545), we get a palindrome (677383776).

The spelling of 545142231 in words is "five hundred forty-five million, one hundred forty-two thousand, two hundred thirty-one".