1217355213 has 16 divisors (see below), whose sum is σ = 1763686400. Its totient is φ = 744053040.

The previous prime is 1217355199. The next prime is 1217355221. The reversal of 1217355213 is 3125537121.

It is not a de Polignac number, because 1217355213 - 2²⁴ = 1200577997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217355253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342703 + ... + 346236.

It is an arithmetic number, because the mean of its divisors is an integer number (110230400).

Almost surely, 2^1217355213 is an apocalyptic number.

It is an amenable number.

1217355213 is a deficient number, since it is larger than the sum of its proper divisors (546331187).

1217355213 is a wasteful number, since it uses less digits than its factorization.

1217355213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688992.

The product of its digits is 6300, while the sum is 30.

The square root of 1217355213 is about 34890.6178363181. The cubic root of 1217355213 is about 1067.7570312010.

The spelling of 1217355213 in words is "one billion, two hundred seventeen million, three hundred fifty-five thousand, two hundred thirteen".