1331013232 has 160 divisors (see below), whose sum is σ = 3037305600. Its totient is φ = 560738304.

The previous prime is 1331013209. The next prime is 1331013239. The reversal of 1331013232 is 2323101331.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331013239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12439323 + ... + 12439429.

It is an arithmetic number, because the mean of its divisors is an integer number (18983160).

Almost surely, 2^1331013232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331013232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518652800).

1331013232 is an abundant number, since it is smaller than the sum of its proper divisors (1706292368).

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

1331013232 is a wasteful number, since it uses less digits than its factorization.

1331013232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1331013232 is about 36483.0540388274. The cubic root of 1331013232 is about 1100.0036451670.

Adding to 1331013232 its reverse (2323101331), we get a palindrome (3654114563).

The spelling of 1331013232 in words is "one billion, three hundred thirty-one million, thirteen thousand, two hundred thirty-two".