539865225 has 27 divisors (see below), whose sum is σ = 967583253. Its totient is φ = 287742240.

The previous prime is 539865203. The next prime is 539865229. The reversal of 539865225 is 522568935.

The square root of 539865225 is 23235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 49154121 + 490711104 = 7011^2 + 22152^2 .

It is not a de Polignac number, because 539865225 - 2¹⁵ = 539832457 is a prime.

It is a super-2 number, since 2×539865225² = 582908922328601250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (539865229) 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 in 26 ways as a sum of consecutive naturals, for example, 347751 + ... + 349299.

Almost surely, 2^539865225 is an apocalyptic number.

539865225 is the 23235-th square number.

539865225 is the 11618-th centered octagonal number.

It is an amenable number.

539865225 is a deficient number, since it is larger than the sum of its proper divisors (427718028).

539865225 is an equidigital number, since it uses as much as digits as its factorization.

539865225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114 (or 1557 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The cubic root of 539865225 is about 814.2575320018.

The spelling of 539865225 in words is "five hundred thirty-nine million, eight hundred sixty-five thousand, two hundred twenty-five".