1311223104 has 42 divisors (see below), whose sum is σ = 3758385930. Its totient is φ = 437074176.

The previous prime is 1311223093. The next prime is 1311223129. The reversal of 1311223104 is 4013221131.

It can be written as a sum of positive squares in only one way, i.e., 1172925504 + 138297600 = 34248^2 + 11760^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1137639 + ... + 1138790.

Almost surely, 2^1311223104 is an apocalyptic number.

It is an amenable number.

1311223104 is an abundant number, since it is smaller than the sum of its proper divisors (2447162826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311223104 is a wasteful number, since it uses less digits than its factorization.

1311223104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276447 (or 2276434 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1311223104 is about 36210.8147381414. The cubic root of 1311223104 is about 1094.5246100545.

Adding to 1311223104 its reverse (4013221131), we get a palindrome (5324444235).

The spelling of 1311223104 in words is "one billion, three hundred eleven million, two hundred twenty-three thousand, one hundred four".