1311230232 has 48 divisors (see below), whose sum is σ = 3824424240. Its totient is φ = 403455168.

The previous prime is 1311230209. The next prime is 1311230251. The reversal of 1311230232 is 2320321131.

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 11 ways as a sum of consecutive naturals, for example, 699508 + ... + 701379.

It is an arithmetic number, because the mean of its divisors is an integer number (79675505).

Almost surely, 2^1311230232 is an apocalyptic number.

1311230232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311230232 is an abundant number, since it is smaller than the sum of its proper divisors (2513194008).

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

1311230232 is a wasteful number, since it uses less digits than its factorization.

1311230232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400912 (or 1400905 counting only the distinct ones).

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

The square root of 1311230232 is about 36210.9131616423. The cubic root of 1311230232 is about 1094.5265933827.

Adding to 1311230232 its reverse (2320321131), we get a palindrome (3631551363).

The spelling of 1311230232 in words is "one billion, three hundred eleven million, two hundred thirty thousand, two hundred thirty-two".