216087619 has 4 divisors (see below), whose sum is σ = 235731960. Its totient is φ = 196443280.

The previous prime is 216087611. The next prime is 216087631. The reversal of 216087619 is 916780612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216087619 - 2³ = 216087611 is a prime.

It is a super-2 number, since 2×216087619² = 93387718170178322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216087611) 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, 9822154 + ... + 9822175.

It is an arithmetic number, because the mean of its divisors is an integer number (58932990).

Almost surely, 2^216087619 is an apocalyptic number.

216087619 is a deficient number, since it is larger than the sum of its proper divisors (19644341).

216087619 is a wasteful number, since it uses less digits than its factorization.

216087619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19644340.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 216087619 is about 14699.9190133824. The cubic root of 216087619 is about 600.0811177364.

The spelling of 216087619 in words is "two hundred sixteen million, eighty-seven thousand, six hundred nineteen".