16488221 has 8 divisors (see below), whose sum is σ = 16926624. Its totient is φ = 16052400.

The previous prime is 16488179. The next prime is 16488223. The reversal of 16488221 is 12288461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16488221 - 2¹⁰ = 16487197 is a prime.

It is a super-2 number, since 2×16488221² = 543722863489682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16488223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23171 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (2115828).

Almost surely, 2^16488221 is an apocalyptic number.

It is an amenable number.

16488221 is a deficient number, since it is larger than the sum of its proper divisors (438403).

16488221 is an equidigital number, since it uses as much as digits as its factorization.

16488221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its digits is 6144, while the sum is 32.

The square root of 16488221 is about 4060.5690487911. The cubic root of 16488221 is about 254.5215737916.

The spelling of 16488221 in words is "sixteen million, four hundred eighty-eight thousand, two hundred twenty-one".