216123619 has 2 divisors, whose sum is σ = 216123620. Its totient is φ = 216123618.

The previous prime is 216123569. The next prime is 216123641. The reversal of 216123619 is 916321612.

216123619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216123619 - 2⁹ = 216123107 is a prime.

It is a super-2 number, since 2×216123619² = 93418837379314322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216123319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108061809 + 108061810.

It is an arithmetic number, because the mean of its divisors is an integer number (108061810).

Almost surely, 2^216123619 is an apocalyptic number.

216123619 is a deficient number, since it is larger than the sum of its proper divisors (1).

216123619 is an equidigital number, since it uses as much as digits as its factorization.

216123619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 216123619 is about 14701.1434589286. The cubic root of 216123619 is about 600.1144402080.

The spelling of 216123619 in words is "two hundred sixteen million, one hundred twenty-three thousand, six hundred nineteen".