1213517217 has 8 divisors (see below), whose sum is σ = 1765116000. Its totient is φ = 735464960.

The previous prime is 1213517197. The next prime is 1213517219. The reversal of 1213517217 is 7127153121.

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 1213517217 - 2⁷ = 1213517089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213517219) 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, 18386592 + ... + 18386657.

It is an arithmetic number, because the mean of its divisors is an integer number (220639500).

Almost surely, 2^1213517217 is an apocalyptic number.

It is an amenable number.

1213517217 is a deficient number, since it is larger than the sum of its proper divisors (551598783).

1213517217 is a wasteful number, since it uses less digits than its factorization.

1213517217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36773263.

The product of its digits is 2940, while the sum is 30.

The square root of 1213517217 is about 34835.5740156524. The cubic root of 1213517217 is about 1066.6337322622.

The spelling of 1213517217 in words is "one billion, two hundred thirteen million, five hundred seventeen thousand, two hundred seventeen".