219732993 has 28 divisors (see below), whose sum is σ = 334042660. Its totient is φ = 144446976.

The previous prime is 219732979. The next prime is 219733013. The reversal of 219732993 is 399237912.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123143409 + 96589584 = 11097^2 + 9828^2 .

It is not a de Polignac number, because 219732993 - 2⁴ = 219732977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (219732493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 51153 + ... + 55281.

It is an arithmetic number, because the mean of its divisors is an integer number (11930095).

Almost surely, 2^219732993 is an apocalyptic number.

It is an amenable number.

219732993 is a deficient number, since it is larger than the sum of its proper divisors (114309667).

219732993 is an frugal number, since it uses more digits than its factorization.

219732993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220 (or 4205 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 219732993 is about 14823.3934374016. The cubic root of 219732993 is about 603.4367519742.

The spelling of 219732993 in words is "two hundred nineteen million, seven hundred thirty-two thousand, nine hundred ninety-three".