217883480 has 16 divisors (see below), whose sum is σ = 490237920. Its totient is φ = 87153376.

The previous prime is 217883443. The next prime is 217883483. The reversal of 217883480 is 84388712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217883483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2723504 + ... + 2723583.

It is an arithmetic number, because the mean of its divisors is an integer number (30639870).

Almost surely, 2^217883480 is an apocalyptic number.

217883480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217883480 is an abundant number, since it is smaller than the sum of its proper divisors (272354440).

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

217883480 is a wasteful number, since it uses less digits than its factorization.

217883480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447098 (or 5447094 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 217883480 is about 14760.8766677322. The cubic root of 217883480 is about 601.7389183658.

It can be divided in two parts, 2178 and 83480, that added together give a palindrome (85658).

The spelling of 217883480 in words is "two hundred seventeen million, eight hundred eighty-three thousand, four hundred eighty".