219011057 has 2 divisors, whose sum is σ = 219011058. Its totient is φ = 219011056.

The previous prime is 219011033. The next prime is 219011069. The reversal of 219011057 is 750110912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165662641 + 53348416 = 12871^2 + 7304^2 .

It is a cyclic number.

It is not a de Polignac number, because 219011057 - 2¹² = 219006961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219011087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109505528 + 109505529.

It is an arithmetic number, because the mean of its divisors is an integer number (109505529).

Almost surely, 2^219011057 is an apocalyptic number.

It is an amenable number.

219011057 is a deficient number, since it is larger than the sum of its proper divisors (1).

219011057 is an equidigital number, since it uses as much as digits as its factorization.

219011057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 219011057 is about 14799.0221636431. The cubic root of 219011057 is about 602.7751600951.

Adding to 219011057 its reverse (750110912), we get a palindrome (969121969).

The spelling of 219011057 in words is "two hundred nineteen million, eleven thousand, fifty-seven".