1331974224 has 120 divisors (see below), whose sum is σ = 4278660672. Its totient is φ = 378915840.

The previous prime is 1331974187. The next prime is 1331974247. The reversal of 1331974224 is 4224791331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

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, 240187 + ... + 245669.

Almost surely, 2^1331974224 is an apocalyptic number.

1331974224 is a gapful number since it is divisible by the number (14) 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 1331974224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2139330336).

1331974224 is an abundant number, since it is smaller than the sum of its proper divisors (2946686448).

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

1331974224 is a wasteful number, since it uses less digits than its factorization.

1331974224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745 (or 5736 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1331974224 is about 36496.2220510562. Note that the first 3 decimals coincide. The cubic root of 1331974224 is about 1100.2683158134.

The spelling of 1331974224 in words is "one billion, three hundred thirty-one million, nine hundred seventy-four thousand, two hundred twenty-four".