545923531 has 2 divisors, whose sum is σ = 545923532. Its totient is φ = 545923530.

The previous prime is 545923529. The next prime is 545923549. The reversal of 545923531 is 135329545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545923531 - 2¹ = 545923529 is a prime.

It is a super-2 number, since 2×545923531² = 596065003399015922, which contains 22 as substring.

Together with 545923529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545923031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272961765 + 272961766.

It is an arithmetic number, because the mean of its divisors is an integer number (272961766).

Almost surely, 2^545923531 is an apocalyptic number.

545923531 is a deficient number, since it is larger than the sum of its proper divisors (1).

545923531 is an equidigital number, since it uses as much as digits as its factorization.

545923531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 545923531 is about 23365.0065482550. The cubic root of 545923531 is about 817.2920442283.

The spelling of 545923531 in words is "five hundred forty-five million, nine hundred twenty-three thousand, five hundred thirty-one".