219207144457 has 12 divisors (see below), whose sum is σ = 255243453696. Its totient is φ = 187709552520.

The previous prime is 219207144449. The next prime is 219207144463. The reversal of 219207144457 is 754441702912.

It is a happy number.

It is not a de Polignac number, because 219207144457 - 2³ = 219207144449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219207144427) 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, 2119033 + ... + 2220070.

It is an arithmetic number, because the mean of its divisors is an integer number (21270287808).

Almost surely, 2^219207144457 is an apocalyptic number.

It is an amenable number.

219207144457 is a deficient number, since it is larger than the sum of its proper divisors (36036309239).

219207144457 is a wasteful number, since it uses less digits than its factorization.

219207144457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340148 (or 4340141 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 219207144457 in words is "two hundred nineteen billion, two hundred seven million, one hundred forty-four thousand, four hundred fifty-seven".