219448117 has 6 divisors (see below), whose sum is σ = 255276438. Its totient is φ = 188098344.

The previous prime is 219448111. The next prime is 219448153. The reversal of 219448117 is 711844912.

It can be written as a sum of positive squares in only one way, i.e., 174477681 + 44970436 = 13209^2 + 6706^2 .

It is a de Polignac number, because none of the positive numbers 2^k-219448117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219448111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2239218 + ... + 2239315.

It is an arithmetic number, because the mean of its divisors is an integer number (42546073).

Almost surely, 2^219448117 is an apocalyptic number.

It is an amenable number.

219448117 is a deficient number, since it is larger than the sum of its proper divisors (35828321).

219448117 is an equidigital number, since it uses as much as digits as its factorization.

219448117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478547 (or 4478540 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 219448117 is about 14813.7813201087. The cubic root of 219448117 is about 603.1758611103.

The spelling of 219448117 in words is "two hundred nineteen million, four hundred forty-eight thousand, one hundred seventeen".