216774619 has 2 divisors, whose sum is σ = 216774620. Its totient is φ = 216774618.

The previous prime is 216774589. The next prime is 216774637. The reversal of 216774619 is 916477612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216774619 - 2⁷ = 216774491 is a prime.

It is a super-2 number, since 2×216774619² = 93982470885190322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216774119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108387309 + 108387310.

It is an arithmetic number, because the mean of its divisors is an integer number (108387310).

Almost surely, 2^216774619 is an apocalyptic number.

216774619 is a deficient number, since it is larger than the sum of its proper divisors (1).

216774619 is an equidigital number, since it uses as much as digits as its factorization.

216774619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 216774619 is about 14723.2679456702. The cubic root of 216774619 is about 600.7163841307.

The spelling of 216774619 in words is "two hundred sixteen million, seven hundred seventy-four thousand, six hundred nineteen".