205244431450 has 48 divisors (see below), whose sum is σ = 406305479160. Its totient is φ = 76868075520.

The previous prime is 205244431421. The next prime is 205244431543. The reversal of 205244431450 is 54134442502.

It can be written as a sum of positive squares in 12 ways, for example, as 116057529 + 205128373921 = 10773^2 + 452911^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461505 + ... + 789604.

Almost surely, 2^205244431450 is an apocalyptic number.

205244431450 is a deficient number, since it is larger than the sum of its proper divisors (201061047710).

205244431450 is a wasteful number, since it uses less digits than its factorization.

205244431450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251331 (or 1251326 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 205244431450 its reverse (54134442502), we get a palindrome (259378873952).

The spelling of 205244431450 in words is "two hundred five billion, two hundred forty-four million, four hundred thirty-one thousand, four hundred fifty".