1331513442 has 48 divisors (see below), whose sum is σ = 3308902272. Its totient is φ = 379068480.

The previous prime is 1331513411. The next prime is 1331513461. The reversal of 1331513442 is 2443151331.

It is a happy number.

1331513442 is a `hidden beast` number, since 1 + 3 + 315 + 1 + 344 + 2 = 666.

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, 16603 + ... + 54209.

It is an arithmetic number, because the mean of its divisors is an integer number (68935464).

Almost surely, 2^1331513442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331513442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654451136).

1331513442 is an abundant number, since it is smaller than the sum of its proper divisors (1977388830).

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

1331513442 is a wasteful number, since it uses less digits than its factorization.

1331513442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37903 (or 37900 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1331513442 is about 36489.9087694119. The cubic root of 1331513442 is about 1100.1414258934.

Adding to 1331513442 its reverse (2443151331), we get a palindrome (3774664773).

The spelling of 1331513442 in words is "one billion, three hundred thirty-one million, five hundred thirteen thousand, four hundred forty-two".