216419819 has 24 divisors (see below), whose sum is σ = 280516608. Its totient is φ = 165031440.

The previous prime is 216419783. The next prime is 216419839. The reversal of 216419819 is 918914612.

It is not a de Polignac number, because 216419819 - 2¹² = 216415723 is a prime.

It is a super-2 number, since 2×216419819² = 93675076111985522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216419839) 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 in 23 ways as a sum of consecutive naturals, for example, 21062 + ... + 29604.

It is an arithmetic number, because the mean of its divisors is an integer number (11688192).

Almost surely, 2^216419819 is an apocalyptic number.

216419819 is a deficient number, since it is larger than the sum of its proper divisors (64096789).

216419819 is a wasteful number, since it uses less digits than its factorization.

216419819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615 (or 8608 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The square root of 216419819 is about 14711.2140559507. The cubic root of 216419819 is about 600.3884697275.

The spelling of 216419819 in words is "two hundred sixteen million, four hundred nineteen thousand, eight hundred nineteen".