17115211220 has 12 divisors (see below), whose sum is σ = 35941943604. Its totient is φ = 6846084480.

The previous prime is 17115211219. The next prime is 17115211241. The reversal of 17115211220 is 2211251171.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12511317316 + 4603893904 = 111854^2 + 67852^2 .

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 3 ways as a sum of consecutive naturals, for example, 427880261 + ... + 427880300.

It is an arithmetic number, because the mean of its divisors is an integer number (2995161967).

Almost surely, 2^17115211220 is an apocalyptic number.

17115211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17115211220 is an abundant number, since it is smaller than the sum of its proper divisors (18826732384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17115211220 is a wasteful number, since it uses less digits than its factorization.

17115211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855760570 (or 855760568 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 17115211220 its reverse (2211251171), we get a palindrome (19326462391).

The spelling of 17115211220 in words is "seventeen billion, one hundred fifteen million, two hundred eleven thousand, two hundred twenty".