217169030 has 16 divisors (see below), whose sum is σ = 420974064. Its totient is φ = 80185440.

The previous prime is 217169027. The next prime is 217169039. The reversal of 217169030 is 30961712.

It is a super-2 number, since 2×217169030² = 94324775182281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217168984 and 217169002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217169039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835136 + ... + 835395.

It is an arithmetic number, because the mean of its divisors is an integer number (26310879).

Almost surely, 2^217169030 is an apocalyptic number.

217169030 is a deficient number, since it is larger than the sum of its proper divisors (203805034).

217169030 is a wasteful number, since it uses less digits than its factorization.

217169030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670551.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 217169030 is about 14736.6559978850. The cubic root of 217169030 is about 601.0804882591.

The spelling of 217169030 in words is "two hundred seventeen million, one hundred sixty-nine thousand, thirty".