205401222 has 24 divisors (see below), whose sum is σ = 479270064. Its totient is φ = 63200304.

The previous prime is 205401221. The next prime is 205401263. The reversal of 205401222 is 222104502.

205401222 is a `hidden beast` number, since 2 + 0 + 540 + 122 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 205401195 and 205401204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205401221) 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 11 ways as a sum of consecutive naturals, for example, 438658 + ... + 439125.

It is an arithmetic number, because the mean of its divisors is an integer number (19969586).

Almost surely, 2^205401222 is an apocalyptic number.

205401222 is an abundant number, since it is smaller than the sum of its proper divisors (273868842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205401222 is a wasteful number, since it uses less digits than its factorization.

205401222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877804 (or 877801 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 205401222 is about 14331.8254943325. The cubic root of 205401222 is about 590.0212785584.

Adding to 205401222 its reverse (222104502), we get a palindrome (427505724).

The spelling of 205401222 in words is "two hundred five million, four hundred one thousand, two hundred twenty-two".