525433621 has 4 divisors (see below), whose sum is σ = 525520044. Its totient is φ = 525347200.

The previous prime is 525433607. The next prime is 525433709. The reversal of 525433621 is 126334525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 246176100 + 279257521 = 15690^2 + 16711^2 .

It is a cyclic number.

It is not a de Polignac number, because 525433621 - 2⁵ = 525433589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525433021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33340 + ... + 46501.

It is an arithmetic number, because the mean of its divisors is an integer number (131380011).

Almost surely, 2^525433621 is an apocalyptic number.

It is an amenable number.

525433621 is a deficient number, since it is larger than the sum of its proper divisors (86423).

525433621 is an equidigital number, since it uses as much as digits as its factorization.

525433621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86422.

The product of its digits is 21600, while the sum is 31.

The square root of 525433621 is about 22922.3389077118. The cubic root of 525433621 is about 806.9363623826.

The spelling of 525433621 in words is "five hundred twenty-five million, four hundred thirty-three thousand, six hundred twenty-one".