219469331 has 2 divisors, whose sum is σ = 219469332. Its totient is φ = 219469330.

The previous prime is 219469309. The next prime is 219469333. The reversal of 219469331 is 133964912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219469331 is a prime.

It is a super-2 number, since 2×219469331² = 96333574499175122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 219469333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219469333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109734665 + 109734666.

It is an arithmetic number, because the mean of its divisors is an integer number (109734666).

Almost surely, 2^219469331 is an apocalyptic number.

219469331 is a deficient number, since it is larger than the sum of its proper divisors (1).

219469331 is an equidigital number, since it uses as much as digits as its factorization.

219469331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 219469331 is about 14814.4973252554. The cubic root of 219469331 is about 603.1952967756.

The spelling of 219469331 in words is "two hundred nineteen million, four hundred sixty-nine thousand, three hundred thirty-one".