219932945 has 8 divisors (see below), whose sum is σ = 264362280. Its totient is φ = 175651200.

The previous prime is 219932929. The next prime is 219932959. The reversal of 219932945 is 549239912.

It is a happy number.

219932945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 121705024 + 98227921 = 11032^2 + 9911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 219932945 - 2⁴ = 219932929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 219932896 and 219932905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33590 + ... + 39599.

It is an arithmetic number, because the mean of its divisors is an integer number (33045285).

Almost surely, 2^219932945 is an apocalyptic number.

It is an amenable number.

219932945 is a deficient number, since it is larger than the sum of its proper divisors (44429335).

219932945 is an equidigital number, since it uses as much as digits as its factorization.

219932945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73795.

The product of its digits is 174960, while the sum is 44.

The square root of 219932945 is about 14830.1363783345. The cubic root of 219932945 is about 603.6197343649.

The spelling of 219932945 in words is "two hundred nineteen million, nine hundred thirty-two thousand, nine hundred forty-five".