1217007355 has 4 divisors (see below), whose sum is σ = 1460408832. Its totient is φ = 973605880.

The previous prime is 1217007329. The next prime is 1217007391. The reversal of 1217007355 is 5537007121.

1217007355 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1217007355 is a prime.

It is a super-2 number, since 2×1217007355² = 2962213804248192050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121700731 + ... + 121700740.

It is an arithmetic number, because the mean of its divisors is an integer number (365102208).

Almost surely, 2^1217007355 is an apocalyptic number.

1217007355 is a deficient number, since it is larger than the sum of its proper divisors (243401477).

1217007355 is an equidigital number, since it uses as much as digits as its factorization.

1217007355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243401476.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 1217007355 is about 34885.6325010741. The cubic root of 1217007355 is about 1067.6553180211.

The spelling of 1217007355 in words is "one billion, two hundred seventeen million, seven thousand, three hundred fifty-five".