205133521 has 8 divisors (see below), whose sum is σ = 214372224. Its totient is φ = 196098000.

The previous prime is 205133507. The next prime is 205133569. The reversal of 205133521 is 125331502.

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 205133521 - 2⁷ = 205133393 is a prime.

It is a super-2 number, since 2×205133521² = 84159522875714882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205133492 and 205133501.

It is not an unprimeable number, because it can be changed into a prime (205133221) 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 7 ways as a sum of consecutive naturals, for example, 48730 + ... + 52771.

It is an arithmetic number, because the mean of its divisors is an integer number (26796528).

Almost surely, 2^205133521 is an apocalyptic number.

It is an amenable number.

205133521 is a deficient number, since it is larger than the sum of its proper divisors (9238703).

205133521 is a wasteful number, since it uses less digits than its factorization.

205133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101591.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 205133521 is about 14322.4830598608. The cubic root of 205133521 is about 589.7648406896.

The spelling of 205133521 in words is "two hundred five million, one hundred thirty-three thousand, five hundred twenty-one".