1311203232 has 36 divisors (see below), whose sum is σ = 3728735010. Its totient is φ = 437067648.

The previous prime is 1311203219. The next prime is 1311203273. The reversal of 1311203232 is 2323021131.

1311203232 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1276204176 + 34999056 = 35724^2 + 5916^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 2276107 + ... + 2276682.

Almost surely, 2^1311203232 is an apocalyptic number.

1311203232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311203232 is an abundant number, since it is smaller than the sum of its proper divisors (2417531778).

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

1311203232 is a wasteful number, since it uses less digits than its factorization.

1311203232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552805 (or 4552794 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1311203232 is about 36210.5403439385. The cubic root of 1311203232 is about 1094.5190807380.

Adding to 1311203232 its reverse (2323021131), we get a palindrome (3634224363).

The spelling of 1311203232 in words is "one billion, three hundred eleven million, two hundred three thousand, two hundred thirty-two".