1313215044 has 24 divisors (see below), whose sum is σ = 3101088480. Its totient is φ = 432464064.

The previous prime is 1313215037. The next prime is 1313215049. The reversal of 1313215044 is 4405123131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1313215049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658249 + ... + 660240.

It is an arithmetic number, because the mean of its divisors is an integer number (129212020).

Almost surely, 2^1313215044 is an apocalyptic number.

It is an amenable number.

1313215044 is an abundant number, since it is smaller than the sum of its proper divisors (1787873436).

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

1313215044 is a wasteful number, since it uses less digits than its factorization.

1313215044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318579 (or 1318577 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1313215044 is about 36238.3090665114. The cubic root of 1313215044 is about 1095.0785773765.

Adding to 1313215044 its reverse (4405123131), we get a palindrome (5718338175).

The spelling of 1313215044 in words is "one billion, three hundred thirteen million, two hundred fifteen thousand, forty-four".