221499316 has 24 divisors (see below), whose sum is σ = 399371336. Its totient is φ = 107412480.

The previous prime is 221499263. The next prime is 221499329. The reversal of 221499316 is 613994122.

It can be written as a sum of positive squares in 4 ways, for example, as 40704400 + 180794916 = 6380^2 + 13446^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47656 + ... + 52096.

Almost surely, 2^221499316 is an apocalyptic number.

It is an amenable number.

221499316 is a deficient number, since it is larger than the sum of its proper divisors (177872020).

221499316 is a wasteful number, since it uses less digits than its factorization.

221499316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819 (or 4817 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 221499316 is about 14882.8530866901. The cubic root of 221499316 is about 605.0493468845.

The spelling of 221499316 in words is "two hundred twenty-one million, four hundred ninety-nine thousand, three hundred sixteen".