221734516 has 12 divisors (see below), whose sum is σ = 388156132. Its totient is φ = 110832768.

The previous prime is 221734501. The next prime is 221734543. The reversal of 221734516 is 615437122.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 201753616 = 4470^2 + 14204^2 .

It is a congruent number.

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, 10606 + ... + 23578.

Almost surely, 2^221734516 is an apocalyptic number.

It is an amenable number.

221734516 is a deficient number, since it is larger than the sum of its proper divisors (166421616).

221734516 is a wasteful number, since it uses less digits than its factorization.

221734516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17250 (or 17248 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 221734516 is about 14890.7527009215. The cubic root of 221734516 is about 605.2634292101.

The spelling of 221734516 in words is "two hundred twenty-one million, seven hundred thirty-four thousand, five hundred sixteen".