1313221044 has 24 divisors (see below), whose sum is σ = 3066100128. Its totient is φ = 437466400.

The previous prime is 1313221027. The next prime is 1313221067. The reversal of 1313221044 is 4401223131.

It is a self number, because there is not a number n which added to its sum of digits gives 1313221044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13782 + ... + 53069.

It is an arithmetic number, because the mean of its divisors is an integer number (127754172).

Almost surely, 2^1313221044 is an apocalyptic number.

It is an amenable number.

1313221044 is an abundant number, since it is smaller than the sum of its proper divisors (1752879084).

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

1313221044 is a wasteful number, since it uses less digits than its factorization.

1313221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68495 (or 68493 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1313221044 is about 36238.3918517365. The cubic root of 1313221044 is about 1095.0802451565.

Adding to 1313221044 its reverse (4401223131), we get a palindrome (5714444175).

The spelling of 1313221044 in words is "one billion, three hundred thirteen million, two hundred twenty-one thousand, forty-four".