217231402 has 16 divisors (see below), whose sum is σ = 338515200. Its totient is φ = 104424880.

The previous prime is 217231393. The next prime is 217231409. The reversal of 217231402 is 204132712.

It is not an unprimeable number, because it can be changed into a prime (217231409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6027 + ... + 21697.

It is an arithmetic number, because the mean of its divisors is an integer number (21157200).

Almost surely, 2^217231402 is an apocalyptic number.

217231402 is a deficient number, since it is larger than the sum of its proper divisors (121283798).

217231402 is a wasteful number, since it uses less digits than its factorization.

217231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15941.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 217231402 is about 14738.7720655420. The cubic root of 217231402 is about 601.1380271626.

The spelling of 217231402 in words is "two hundred seventeen million, two hundred thirty-one thousand, four hundred two".