1331124432 has 160 divisors (see below), whose sum is σ = 3919403904. Its totient is φ = 385689600.

The previous prime is 1331124427. The next prime is 1331124437. The reversal of 1331124432 is 2344211331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1331124427) and next prime (1331124437).

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331124437) 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, 1191138 + ... + 1192254.

Almost surely, 2^1331124432 is an apocalyptic number.

1331124432 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 1331124432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959701952).

1331124432 is an abundant number, since it is smaller than the sum of its proper divisors (2588279472).

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

1331124432 is a wasteful number, since it uses less digits than its factorization.

1331124432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1231 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1331124432 is about 36484.5780022190. The cubic root of 1331124432 is about 1100.0342777197.

Adding to 1331124432 its reverse (2344211331), we get a palindrome (3675335763).

The spelling of 1331124432 in words is "one billion, three hundred thirty-one million, one hundred twenty-four thousand, four hundred thirty-two".