16219481 has 2 divisors, whose sum is σ = 16219482. Its totient is φ = 16219480.

The previous prime is 16219447. The next prime is 16219499. The reversal of 16219481 is 18491261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 6553600 = 3109^2 + 2560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16219481 is a prime.

It is a super-2 number, since 2×16219481² = 526143127818722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16219421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109740 + 8109741.

It is an arithmetic number, because the mean of its divisors is an integer number (8109741).

Almost surely, 2^16219481 is an apocalyptic number.

It is an amenable number.

16219481 is a deficient number, since it is larger than the sum of its proper divisors (1).

16219481 is an equidigital number, since it uses as much as digits as its factorization.

16219481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 16219481 is about 4027.3416790732. The cubic root of 16219481 is about 253.1311843431.

The spelling of 16219481 in words is "sixteen million, two hundred nineteen thousand, four hundred eighty-one".