1217355240238 has 16 divisors (see below), whose sum is σ = 1905452255520. Its totient is φ = 582205229056.

The previous prime is 1217355240221. The next prime is 1217355240301. The reversal of 1217355240238 is 8320425537121.

It is a junction number, because it is equal to n+sod(n) for n = 1217355240194 and 1217355240203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4313118 + ... + 4586686.

It is an arithmetic number, because the mean of its divisors is an integer number (119090765970).

Almost surely, 2^{1217355240238} is an apocalyptic number.

1217355240238 is a deficient number, since it is larger than the sum of its proper divisors (688097015282).

1217355240238 is a wasteful number, since it uses less digits than its factorization.

1217355240238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370331.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 1217355240238 in words is "one trillion, two hundred seventeen billion, three hundred fifty-five million, two hundred forty thousand, two hundred thirty-eight".