205422401 has 8 divisors (see below), whose sum is σ = 207328800. Its totient is φ = 203522400.

The previous prime is 205422397. The next prime is 205422403. The reversal of 205422401 is 104224502.

It is a happy number.

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 205422401 - 2² = 205422397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205422403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82310 + ... + 84768.

It is an arithmetic number, because the mean of its divisors is an integer number (25916100).

Almost surely, 2^205422401 is an apocalyptic number.

It is an amenable number.

205422401 is a deficient number, since it is larger than the sum of its proper divisors (1906399).

205422401 is a wasteful number, since it uses less digits than its factorization.

205422401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 205422401 is about 14332.5643553413. The cubic root of 205422401 is about 590.0415569694.

Adding to 205422401 its reverse (104224502), we get a palindrome (309646903).

The spelling of 205422401 in words is "two hundred five million, four hundred twenty-two thousand, four hundred one".