525054521 has 4 divisors (see below), whose sum is σ = 530954100. Its totient is φ = 519154944.

The previous prime is 525054499. The next prime is 525054529. The reversal of 525054521 is 125450525.

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 328914496 + 196140025 = 18136^2 + 14005^2 .

It is a cyclic number.

It is not a de Polignac number, because 525054521 - 2¹⁸ = 524792377 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525054529) 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, 2949656 + ... + 2949833.

It is an arithmetic number, because the mean of its divisors is an integer number (132738525).

Almost surely, 2^525054521 is an apocalyptic number.

It is an amenable number.

525054521 is a deficient number, since it is larger than the sum of its proper divisors (5899579).

525054521 is an equidigital number, since it uses as much as digits as its factorization.

525054521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899578.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 525054521 is about 22914.0681896515. The cubic root of 525054521 is about 806.7422476784.

The spelling of 525054521 in words is "five hundred twenty-five million, fifty-four thousand, five hundred twenty-one".