221430316 has 12 divisors (see below), whose sum is σ = 392811832. Its totient is φ = 109198368.

The previous prime is 221430281. The next prime is 221430329. The reversal of 221430316 is 613034122.

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, 378870 + ... + 379453.

Almost surely, 2^221430316 is an apocalyptic number.

It is an amenable number.

221430316 is a deficient number, since it is larger than the sum of its proper divisors (171381516).

221430316 is a wasteful number, since it uses less digits than its factorization.

221430316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758400 (or 758398 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 221430316 is about 14880.5348022173. The cubic root of 221430316 is about 604.9865133710.

Adding to 221430316 its reverse (613034122), we get a palindrome (834464438).

The spelling of 221430316 in words is "two hundred twenty-one million, four hundred thirty thousand, three hundred sixteen".