205253305402 has 4 divisors (see below), whose sum is σ = 307879958106. Its totient is φ = 102626652700.

The previous prime is 205253305391. The next prime is 205253305427. The reversal of 205253305402 is 204503352502.

205253305402 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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., 182611783561 + 22641521841 = 427331^2 + 150471^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51313326349 + ... + 51313326352.

Almost surely, 2^205253305402 is an apocalyptic number.

205253305402 is a deficient number, since it is larger than the sum of its proper divisors (102626652704).

205253305402 is a wasteful number, since it uses less digits than its factorization.

205253305402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102626652703.

The product of its (nonzero) digits is 36000, while the sum is 31.

Adding to 205253305402 its reverse (204503352502), we get a palindrome (409756657904).

The spelling of 205253305402 in words is "two hundred five billion, two hundred fifty-three million, three hundred five thousand, four hundred two".