204400243331401 has 4 divisors (see below), whose sum is σ = 220123338972292. Its totient is φ = 188677147690512.

The previous prime is 204400243331381. The next prime is 204400243331429. The reversal of 204400243331401 is 104133342004402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38322896921401 + 166077346410000 = 6190549^2 + 12887100^2 .

It is not a de Polignac number, because 204400243331401 - 2¹⁹ = 204400242807113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204400243331101) 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, 7861547820426 + ... + 7861547820451.

It is an arithmetic number, because the mean of its divisors is an integer number (55030834743073).

Almost surely, 2^{204400243331401} is an apocalyptic number.

It is an amenable number.

204400243331401 is a deficient number, since it is larger than the sum of its proper divisors (15723095640891).

204400243331401 is a wasteful number, since it uses less digits than its factorization.

204400243331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15723095640890.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 204400243331401 its reverse (104133342004402), we get a palindrome (308533585335803).

The spelling of 204400243331401 in words is "two hundred four trillion, four hundred billion, two hundred forty-three million, three hundred thirty-one thousand, four hundred one".