1232311320 has 96 divisors (see below), whose sum is σ = 4153378320. Its totient is φ = 328613760.

The previous prime is 1232311313. The next prime is 1232311343. The reversal of 1232311320 is 231132321.

1232311320 is a `hidden beast` number, since 1 + 2 + 32 + 311 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1232311293 and 1232311302.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 53671 + ... + 73110.

Almost surely, 2^1232311320 is an apocalyptic number.

1232311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232311320 is an abundant number, since it is smaller than the sum of its proper divisors (2921067000).

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

1232311320 is a wasteful number, since it uses less digits than its factorization.

1232311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126807 (or 126791 counting only the distinct ones).

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

The square root of 1232311320 is about 35104.2920452756. The cubic root of 1232311320 is about 1072.1119726916. Note that the first 3 decimals are identical.

Adding to 1232311320 its reverse (231132321), we get a palindrome (1463443641).

The spelling of 1232311320 in words is "one billion, two hundred thirty-two million, three hundred eleven thousand, three hundred twenty".