219231993 has 16 divisors (see below), whose sum is σ = 300663296. Its totient is φ = 141989760.

The previous prime is 219231989. The next prime is 219231997. The reversal of 219231993 is 399132912.

It is an interprime number because it is at equal distance from previous prime (219231989) and next prime (219231997).

It is not a de Polignac number, because 219231993 - 2² = 219231989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219231997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109005 + ... + 110997.

It is an arithmetic number, because the mean of its divisors is an integer number (18791456).

Almost surely, 2^219231993 is an apocalyptic number.

It is an amenable number.

219231993 is a deficient number, since it is larger than the sum of its proper divisors (81431303).

219231993 is a wasteful number, since it uses less digits than its factorization.

219231993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 26244, while the sum is 39.

The square root of 219231993 is about 14806.4848292902. The cubic root of 219231993 is about 602.9777830097.

The spelling of 219231993 in words is "two hundred nineteen million, two hundred thirty-one thousand, nine hundred ninety-three".