545323131 has 32 divisors (see below), whose sum is σ = 832078400. Its totient is φ = 352719360.

The previous prime is 545323111. The next prime is 545323133. The reversal of 545323131 is 131323545.

It is not a de Polignac number, because 545323131 - 2⁹ = 545322619 is a prime.

It is a super-4 number, since 4×545323131⁴ (a number of 36 digits) contains 4444 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 Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545323095 and 545323104.

It is not an unprimeable number, because it can be changed into a prime (545323133) 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 31 ways as a sum of consecutive naturals, for example, 539955 + ... + 540963.

It is an arithmetic number, because the mean of its divisors is an integer number (26002450).

Almost surely, 2^545323131 is an apocalyptic number.

545323131 is a deficient number, since it is larger than the sum of its proper divisors (286755269).

545323131 is a wasteful number, since it uses less digits than its factorization.

545323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1590 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 545323131 is about 23352.1547399806. The cubic root of 545323131 is about 816.9923184029.

Adding to 545323131 its reverse (131323545), we get a palindrome (676646676).

The spelling of 545323131 in words is "five hundred forty-five million, three hundred twenty-three thousand, one hundred thirty-one".