16220530 has 8 divisors (see below), whose sum is σ = 29196972. Its totient is φ = 6488208.

The previous prime is 16220521. The next prime is 16220537. The reversal of 16220530 is 3502261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15124321 + 1096209 = 3889^2 + 1047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 16220498 and 16220507.

It is not an unprimeable number, because it can be changed into a prime (16220537) by changing a digit.

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, 811017 + ... + 811036.

Almost surely, 2^16220530 is an apocalyptic number.

16220530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16220530 is a deficient number, since it is larger than the sum of its proper divisors (12976442).

16220530 is a wasteful number, since it uses less digits than its factorization.

16220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622060.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 16220530 is about 4027.4719117580. The cubic root of 16220530 is about 253.1366413383.

Adding to 16220530 its reverse (3502261), we get a palindrome (19722791).

The spelling of 16220530 in words is "sixteen million, two hundred twenty thousand, five hundred thirty".