16221292 has 12 divisors (see below), whose sum is σ = 28416976. Its totient is φ = 8102160.

The previous prime is 16221253. The next prime is 16221311. The reversal of 16221292 is 29212261.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4417 + ... + 7207.

Almost surely, 2^16221292 is an apocalyptic number.

It is an amenable number.

16221292 is a deficient number, since it is larger than the sum of its proper divisors (12195684).

16221292 is a wasteful number, since it uses less digits than its factorization.

16221292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248 (or 4246 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 16221292 is about 4027.5665109344. The cubic root of 16221292 is about 253.1406051854.

The spelling of 16221292 in words is "sixteen million, two hundred twenty-one thousand, two hundred ninety-two".