1313221642 has 16 divisors (see below), whose sum is σ = 2012895360. Its totient is φ = 642272608.

The previous prime is 1313221631. The next prime is 1313221687. The reversal of 1313221642 is 2461223131.

It is a super-3 number, since 3×1313221642³ (a number of 28 digits) contains 333 as substring.

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, 239718 + ... + 245134.

It is an arithmetic number, because the mean of its divisors is an integer number (125805960).

Almost surely, 2^1313221642 is an apocalyptic number.

1313221642 is a deficient number, since it is larger than the sum of its proper divisors (699673718).

1313221642 is a wasteful number, since it uses less digits than its factorization.

1313221642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045.

The product of its digits is 1728, while the sum is 25.

The square root of 1313221642 is about 36238.4001026535. The cubic root of 1313221642 is about 1095.0804113783.

Adding to 1313221642 its reverse (2461223131), we get a palindrome (3774444773).

The spelling of 1313221642 in words is "one billion, three hundred thirteen million, two hundred twenty-one thousand, six hundred forty-two".