1205523203 has 2 divisors, whose sum is σ = 1205523204. Its totient is φ = 1205523202.

The previous prime is 1205523167. The next prime is 1205523247. The reversal of 1205523203 is 3023255021.

It is a weak prime.

It is an emirp because it is prime and its reverse (3023255021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1205523203 - 2²⁶ = 1138414339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205523503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602761601 + 602761602.

It is an arithmetic number, because the mean of its divisors is an integer number (602761602).

Almost surely, 2^1205523203 is an apocalyptic number.

1205523203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205523203 is an equidigital number, since it uses as much as digits as its factorization.

1205523203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1205523203 is about 34720.6451984983. The cubic root of 1205523203 is about 1064.2864295074.

Adding to 1205523203 its reverse (3023255021), we get a palindrome (4228778224).

The spelling of 1205523203 in words is "one billion, two hundred five million, five hundred twenty-three thousand, two hundred three".