1313442221 has 16 divisors (see below), whose sum is σ = 1620132864. Its totient is φ = 1036900224.

The previous prime is 1313442211. The next prime is 1313442239. The reversal of 1313442221 is 1222443131.

It is a cyclic number.

It is not a de Polignac number, because 1313442221 - 2⁶ = 1313442157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313442211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25796 + ... + 57378.

It is an arithmetic number, because the mean of its divisors is an integer number (101258304).

Almost surely, 2^1313442221 is an apocalyptic number.

It is an amenable number.

1313442221 is a deficient number, since it is larger than the sum of its proper divisors (306690643).

1313442221 is a wasteful number, since it uses less digits than its factorization.

1313442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32060.

The product of its digits is 1152, while the sum is 23.

The square root of 1313442221 is about 36241.4434177228. The cubic root of 1313442221 is about 1095.1417207088.

Adding to 1313442221 its reverse (1222443131), we get a palindrome (2535885352).

It can be divided in two parts, 13134 and 42221, that added together give a palindrome (55355).

The spelling of 1313442221 in words is "one billion, three hundred thirteen million, four hundred forty-two thousand, two hundred twenty-one".