219897 has 12 divisors (see below), whose sum is σ = 324324. Its totient is φ = 143520.

The previous prime is 219889. The next prime is 219911. The reversal of 219897 is 798912.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114921 + 104976 = 339^2 + 324^2 .

It is not a de Polignac number, because 219897 - 2³ = 219889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219847) 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, 247 + ... + 707.

It is an arithmetic number, because the mean of its divisors is an integer number (27027).

2²¹⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

219897 is a deficient number, since it is larger than the sum of its proper divisors (104427).

219897 is a wasteful number, since it uses less digits than its factorization.

219897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 517 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 219897 is about 468.9317647590. The cubic root of 219897 is about 60.3586848139.

The spelling of 219897 in words is "two hundred nineteen thousand, eight hundred ninety-seven".