211028819 has 2 divisors, whose sum is σ = 211028820. Its totient is φ = 211028818.

The previous prime is 211028813. The next prime is 211028869. The reversal of 211028819 is 918820112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211028819 is a prime.

It is a super-2 number, since 2×211028819² = 89066324897069522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_11655149 and since 211028819 and 11655149 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (211028813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105514409 + 105514410.

It is an arithmetic number, because the mean of its divisors is an integer number (105514410).

Almost surely, 2^211028819 is an apocalyptic number.

211028819 is a deficient number, since it is larger than the sum of its proper divisors (1).

211028819 is an equidigital number, since it uses as much as digits as its factorization.

211028819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 211028819 is about 14526.8310033538. The cubic root of 211028819 is about 595.3612842439.

The spelling of 211028819 in words is "two hundred eleven million, twenty-eight thousand, eight hundred nineteen".