205602001 has 4 divisors (see below), whose sum is σ = 224293104. Its totient is φ = 186910900.

The previous prime is 205601969. The next prime is 205602041. The reversal of 205602001 is 100206502.

It is a happy number.

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 not a de Polignac number, because 205602001 - 2⁵ = 205601969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205602041) 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, 9345535 + ... + 9345556.

It is an arithmetic number, because the mean of its divisors is an integer number (56073276).

Almost surely, 2^205602001 is an apocalyptic number.

It is an amenable number.

205602001 is a deficient number, since it is larger than the sum of its proper divisors (18691103).

205602001 is a wasteful number, since it uses less digits than its factorization.

205602001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18691102.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 205602001 is about 14338.8284388928. The cubic root of 205602001 is about 590.2134638868.

Adding to 205602001 its reverse (100206502), we get a palindrome (305808503).

It can be divided in two parts, 205 and 602001, that added together give a palindrome (602206).

The spelling of 205602001 in words is "two hundred five million, six hundred two thousand, one".