16531219 has 2 divisors, whose sum is σ = 16531220. Its totient is φ = 16531218.

The previous prime is 16531211. The next prime is 16531223. The reversal of 16531219 is 91213561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16531219 - 2³ = 16531211 is a prime.

It is a super-2 number, since 2×16531219² = 546562403251922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16531211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8265609 + 8265610.

It is an arithmetic number, because the mean of its divisors is an integer number (8265610).

Almost surely, 2^16531219 is an apocalyptic number.

16531219 is a deficient number, since it is larger than the sum of its proper divisors (1).

16531219 is an equidigital number, since it uses as much as digits as its factorization.

16531219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 16531219 is about 4065.8601795930. The cubic root of 16531219 is about 254.7426289558.

The spelling of 16531219 in words is "sixteen million, five hundred thirty-one thousand, two hundred nineteen".