205535001 has 8 divisors (see below), whose sum is σ = 313196224. Its totient is φ = 117448560.

The previous prime is 205534997. The next prime is 205535051. The reversal of 205535001 is 100535502.

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

It is not a de Polignac number, because 205535001 - 2² = 205534997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9787381 = 205535001 / (2 + 0 + 5 + 5 + 3 + 5 + 0 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205535051) 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, 4893670 + ... + 4893711.

It is an arithmetic number, because the mean of its divisors is an integer number (39149528).

Almost surely, 2^205535001 is an apocalyptic number.

205535001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

205535001 is a deficient number, since it is larger than the sum of its proper divisors (107661223).

205535001 is an equidigital number, since it uses as much as digits as its factorization.

205535001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9787391.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 205535001 is about 14336.4919349191. The cubic root of 205535001 is about 590.1493455123.

The spelling of 205535001 in words is "two hundred five million, five hundred thirty-five thousand, one".