205223402 has 4 divisors (see below), whose sum is σ = 307835106. Its totient is φ = 102611700.

The previous prime is 205223377. The next prime is 205223407. The reversal of 205223402 is 204322502.

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

It can be written as a sum of positive squares in only one way, i.e., 174741961 + 30481441 = 13219^2 + 5521^2 .

It is a super-3 number, since 3×205223402³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (205223407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51305849 + ... + 51305852.

Almost surely, 2^205223402 is an apocalyptic number.

205223402 is a deficient number, since it is larger than the sum of its proper divisors (102611704).

205223402 is a wasteful number, since it uses less digits than its factorization.

205223402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102611703.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 205223402 is about 14325.6204752185. The cubic root of 205223402 is about 589.8509649421.

Adding to 205223402 its reverse (204322502), we get a palindrome (409545904).

The spelling of 205223402 in words is "two hundred five million, two hundred twenty-three thousand, four hundred two".