216772619 has 6 divisors (see below), whose sum is σ = 252164124. Its totient is φ = 185805060.

The previous prime is 216772613. The next prime is 216772637. The reversal of 216772619 is 916277612.

216772619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-216772619 is a prime.

It is a super-2 number, since 2×216772619² = 93980736696238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216772613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2211917 + ... + 2212014.

It is an arithmetic number, because the mean of its divisors is an integer number (42027354).

Almost surely, 2^216772619 is an apocalyptic number.

216772619 is a deficient number, since it is larger than the sum of its proper divisors (35391505).

216772619 is an equidigital number, since it uses as much as digits as its factorization.

216772619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423945 (or 4423938 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 216772619 is about 14723.2000258096. The cubic root of 216772619 is about 600.7145366874.

The spelling of 216772619 in words is "two hundred sixteen million, seven hundred seventy-two thousand, six hundred nineteen".