217621482 has 16 divisors (see below), whose sum is σ = 468723360. Its totient is φ = 66960432.

The previous prime is 217621433. The next prime is 217621487. The reversal of 217621482 is 284126712.

It is not an unprimeable number, because it can be changed into a prime (217621487) 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, 1394932 + ... + 1395087.

It is an arithmetic number, because the mean of its divisors is an integer number (29295210).

Almost surely, 2^217621482 is an apocalyptic number.

217621482 is an abundant number, since it is smaller than the sum of its proper divisors (251101878).

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

217621482 is a wasteful number, since it uses less digits than its factorization.

217621482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790037.

The product of its digits is 10752, while the sum is 33.

The square root of 217621482 is about 14751.9992543384. Note that the first 3 decimals coincide. The cubic root of 217621482 is about 601.4976309479.

The spelling of 217621482 in words is "two hundred seventeen million, six hundred twenty-one thousand, four hundred eighty-two".