1313333221 has 8 divisors (see below), whose sum is σ = 1340661888. Its totient is φ = 1286250000.

The previous prime is 1313333213. The next prime is 1313333239. The reversal of 1313333221 is 1223333131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313333221 - 2³ = 1313333213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313333192 and 1313333201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313333201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50530 + ... + 71971.

It is an arithmetic number, because the mean of its divisors is an integer number (167582736).

Almost surely, 2^1313333221 is an apocalyptic number.

It is an amenable number.

1313333221 is a deficient number, since it is larger than the sum of its proper divisors (27328667).

1313333221 is a wasteful number, since it uses less digits than its factorization.

1313333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122723.

The product of its digits is 972, while the sum is 22.

The square root of 1313333221 is about 36239.9395832830. The cubic root of 1313333221 is about 1095.1114253146. Note that the first 3 decimals are identical.

Adding to 1313333221 its reverse (1223333131), we get a palindrome (2536666352).

The spelling of 1313333221 in words is "one billion, three hundred thirteen million, three hundred thirty-three thousand, two hundred twenty-one".