217120196 has 12 divisors (see below), whose sum is σ = 380185260. Its totient is φ = 108495840.

The previous prime is 217120153. The next prime is 217120219. The reversal of 217120196 is 691021712.

It can be written as a sum of positive squares in 2 ways, for example, as 128006596 + 89113600 = 11314^2 + 9440^2 .

It is a super-2 number, since 2×217120196² = 94282359022156832, which contains 22 as substring.

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, 8015 + ... + 22326.

It is an arithmetic number, because the mean of its divisors is an integer number (31682105).

Almost surely, 2^217120196 is an apocalyptic number.

It is an amenable number.

217120196 is a deficient number, since it is larger than the sum of its proper divisors (163065064).

217120196 is a wasteful number, since it uses less digits than its factorization.

217120196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32134 (or 32132 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 217120196 is about 14734.9990159484. Note that the first 3 decimals coincide. The cubic root of 217120196 is about 601.0354306297.

Adding to 217120196 its sum of digits (29), we get a square (217120225 = 14735²).

It can be divided in two parts, 21 and 7120196, that added together give a palindrome (7120217).

The spelling of 217120196 in words is "two hundred seventeen million, one hundred twenty thousand, one hundred ninety-six".