539525681 has 4 divisors (see below), whose sum is σ = 546355200. Its totient is φ = 532696164.

The previous prime is 539525671. The next prime is 539525711. The reversal of 539525681 is 186525935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186525935 = 5 ⋅37305187.

It is a cyclic number.

It is not a de Polignac number, because 539525681 - 2¹⁸ = 539263537 is a prime.

It is a super-2 number, since 2×539525681² = 582175920917027522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (539525611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3414641 + ... + 3414798.

It is an arithmetic number, because the mean of its divisors is an integer number (136588800).

Almost surely, 2^539525681 is an apocalyptic number.

It is an amenable number.

539525681 is a deficient number, since it is larger than the sum of its proper divisors (6829519).

539525681 is an equidigital number, since it uses as much as digits as its factorization.

539525681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829518.

The product of its digits is 324000, while the sum is 44.

The square root of 539525681 is about 23227.6921152318. The cubic root of 539525681 is about 814.0867892377.

The spelling of 539525681 in words is "five hundred thirty-nine million, five hundred twenty-five thousand, six hundred eighty-one".