1231133232 has 120 divisors (see below), whose sum is σ = 3760769712. Its totient is φ = 345945600.

The previous prime is 1231133209. The next prime is 1231133269. The reversal of 1231133232 is 2323311321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1231133199 and 1231133208.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139182 + ... + 147762.

Almost surely, 2^1231133232 is an apocalyptic number.

1231133232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231133232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1880384856).

1231133232 is an abundant number, since it is smaller than the sum of its proper divisors (2529636480).

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

1231133232 is a wasteful number, since it uses less digits than its factorization.

1231133232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667 (or 8654 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1231133232 is about 35087.5082044878. The cubic root of 1231133232 is about 1071.7702178844.

Adding to 1231133232 its reverse (2323311321), we get a palindrome (3554444553).

The spelling of 1231133232 in words is "one billion, two hundred thirty-one million, one hundred thirty-three thousand, two hundred thirty-two".