205200001 has 4 divisors (see below), whose sum is σ = 206676400. Its totient is φ = 203723604.

The previous prime is 205199989. The next prime is 205200049. The reversal of 205200001 is 100002502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205200001 - 2⁷ = 205199873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205203001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737991 + ... + 738268.

It is an arithmetic number, because the mean of its divisors is an integer number (51669100).

Almost surely, 2^205200001 is an apocalyptic number.

It is an amenable number.

205200001 is a deficient number, since it is larger than the sum of its proper divisors (1476399).

205200001 is a wasteful number, since it uses less digits than its factorization.

205200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476398.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 205200001 is about 14324.8036984805. The cubic root of 205200001 is about 589.8285444531.

Adding to 205200001 its reverse (100002502), we get a palindrome (305202503).

The spelling of 205200001 in words is "two hundred five million, two hundred thousand, one".