213525521 has 8 divisors (see below), whose sum is σ = 240969600. Its totient is φ = 187420240.

The previous prime is 213525517. The next prime is 213525523. The reversal of 213525521 is 125525312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213525521 - 2² = 213525517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213525523) 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 7 ways as a sum of consecutive naturals, for example, 334361 + ... + 334998.

It is an arithmetic number, because the mean of its divisors is an integer number (30121200).

Almost surely, 2^213525521 is an apocalyptic number.

It is an amenable number.

213525521 is a deficient number, since it is larger than the sum of its proper divisors (27444079).

213525521 is a wasteful number, since it uses less digits than its factorization.

213525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669399.

The product of its digits is 3000, while the sum is 26.

The square root of 213525521 is about 14612.5124807475. The cubic root of 213525521 is about 597.7000104195.

The spelling of 213525521 in words is "two hundred thirteen million, five hundred twenty-five thousand, five hundred twenty-one".