1313021217 has 8 divisors (see below), whose sum is σ = 1826812224. Its totient is φ = 837288848.

The previous prime is 1313021209. The next prime is 1313021221. The reversal of 1313021217 is 7121203131.

It is a happy number.

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 1313021217 - 2³ = 1313021209 is a prime.

It is a super-2 number, since 2×1313021217² = 3448049432584322178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313021193 and 1313021202.

It is not an unprimeable number, because it can be changed into a prime (1313021207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9514578 + ... + 9514715.

It is an arithmetic number, because the mean of its divisors is an integer number (228351528).

Almost surely, 2^1313021217 is an apocalyptic number.

It is an amenable number.

1313021217 is a deficient number, since it is larger than the sum of its proper divisors (513791007).

1313021217 is a wasteful number, since it uses less digits than its factorization.

1313021217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19029319.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1313021217 is about 36235.6346294639. The cubic root of 1313021217 is about 1095.0246978437.

Adding to 1313021217 its reverse (7121203131), we get a palindrome (8434224348).

The spelling of 1313021217 in words is "one billion, three hundred thirteen million, twenty-one thousand, two hundred seventeen".