525665329 has 4 divisors (see below), whose sum is σ = 600760384. Its totient is φ = 450570276.

The previous prime is 525665321. The next prime is 525665363. The reversal of 525665329 is 923566525.

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.

It is a cyclic number.

It is not a de Polignac number, because 525665329 - 2³ = 525665321 is a prime.

It is a super-2 number, since 2×525665329² = 552648076225356482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (525665321) 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 3 ways as a sum of consecutive naturals, for example, 37547517 + ... + 37547530.

It is an arithmetic number, because the mean of its divisors is an integer number (150190096).

Almost surely, 2^525665329 is an apocalyptic number.

It is an amenable number.

525665329 is a deficient number, since it is larger than the sum of its proper divisors (75095055).

525665329 is an equidigital number, since it uses as much as digits as its factorization.

525665329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75095054.

The product of its digits is 486000, while the sum is 43.

The square root of 525665329 is about 22927.3925469077. The cubic root of 525665329 is about 807.0549603848.

The spelling of 525665329 in words is "five hundred twenty-five million, six hundred sixty-five thousand, three hundred twenty-nine".