205403401 has 8 divisors (see below), whose sum is σ = 248555520. Its totient is φ = 165703488.

The previous prime is 205403369. The next prime is 205403431. The reversal of 205403401 is 104304502.

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

It is not a de Polignac number, because 205403401 - 2⁵ = 205403369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205403431) 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, 862921 + ... + 863158.

It is an arithmetic number, because the mean of its divisors is an integer number (31069440).

Almost surely, 2^205403401 is an apocalyptic number.

It is an amenable number.

205403401 is a deficient number, since it is larger than the sum of its proper divisors (43152119).

205403401 is a wasteful number, since it uses less digits than its factorization.

205403401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726103.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 205403401 is about 14331.9015137559. The cubic root of 205403401 is about 590.0233649657.

Adding to 205403401 its reverse (104304502), we get a palindrome (309707903).

The spelling of 205403401 in words is "two hundred five million, four hundred three thousand, four hundred one".