1311204355 has 16 divisors (see below), whose sum is σ = 1676795904. Its totient is φ = 982004320.

The previous prime is 1311204329. The next prime is 1311204359. The reversal of 1311204355 is 5534021131.

It is a happy number.

It is not a de Polignac number, because 1311204355 - 2²³ = 1302815747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311204359) 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 15 ways as a sum of consecutive naturals, for example, 115891 + ... + 126700.

It is an arithmetic number, because the mean of its divisors is an integer number (104799744).

Almost surely, 2^1311204355 is an apocalyptic number.

1311204355 is a deficient number, since it is larger than the sum of its proper divisors (365591549).

1311204355 is a wasteful number, since it uses less digits than its factorization.

1311204355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242666.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1311204355 is about 36210.5558504699. Note that the first 3 decimals coincide. The cubic root of 1311204355 is about 1094.5193932104.

Adding to 1311204355 its reverse (5534021131), we get a palindrome (6845225486).

The spelling of 1311204355 in words is "one billion, three hundred eleven million, two hundred four thousand, three hundred fifty-five".