204522400221 has 16 divisors (see below), whose sum is σ = 273425742336. Its totient is φ = 135983920176.

The previous prime is 204522400219. The next prime is 204522400223. The reversal of 204522400221 is 122004225402.

It is an interprime number because it is at equal distance from previous prime (204522400219) and next prime (204522400223).

It is not a de Polignac number, because 204522400221 - 2¹ = 204522400219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204522400191 and 204522400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204522400223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3295746 + ... + 3357228.

It is an arithmetic number, because the mean of its divisors is an integer number (17089108896).

Almost surely, 2^204522400221 is an apocalyptic number.

It is an amenable number.

204522400221 is a deficient number, since it is larger than the sum of its proper divisors (68903342115).

204522400221 is a wasteful number, since it uses less digits than its factorization.

204522400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64432.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 204522400221 its reverse (122004225402), we get a palindrome (326526625623).

The spelling of 204522400221 in words is "two hundred four billion, five hundred twenty-two million, four hundred thousand, two hundred twenty-one".