211216019 has 12 divisors (see below), whose sum is σ = 254174400. Its totient is φ = 174798288.

The previous prime is 211216003. The next prime is 211216021. The reversal of 211216019 is 910612112.

It is a happy number.

It is not a de Polignac number, because 211216019 - 2⁴ = 211216003 is a prime.

It is a super-2 number, since 2×211216019² = 89224413364416722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211215985 and 211216003.

It is not an unprimeable number, because it can be changed into a prime (211216079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72899 + ... + 75740.

It is an arithmetic number, because the mean of its divisors is an integer number (21181200).

Almost surely, 2^211216019 is an apocalyptic number.

211216019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

211216019 is a deficient number, since it is larger than the sum of its proper divisors (42958381).

211216019 is a wasteful number, since it uses less digits than its factorization.

211216019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148682 (or 148675 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 211216019 is about 14533.2728247976. The cubic root of 211216019 is about 595.5372770990.

The spelling of 211216019 in words is "two hundred eleven million, two hundred sixteen thousand, nineteen".