721800230 has 8 divisors (see below), whose sum is σ = 1299240432. Its totient is φ = 288720088.

The previous prime is 721800221. The next prime is 721800241. The reversal of 721800230 is 32008127.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 721800196 and 721800205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36090002 + ... + 36090021.

It is an arithmetic number, because the mean of its divisors is an integer number (162405054).

Almost surely, 2^721800230 is an apocalyptic number.

721800230 is a deficient number, since it is larger than the sum of its proper divisors (577440202).

721800230 is a wasteful number, since it uses less digits than its factorization.

721800230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72180030.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 721800230 is about 26866.3400931351. The cubic root of 721800230 is about 897.0273238268.

Adding to 721800230 its reverse (32008127), we get a palindrome (753808357).

The spelling of 721800230 in words is "seven hundred twenty-one million, eight hundred thousand, two hundred thirty".