72430206221 has 8 divisors (see below), whose sum is σ = 73563747264. Its totient is φ = 71302876960.

The previous prime is 72430206203. The next prime is 72430206257. The reversal of 72430206221 is 12260203427.

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

It is a cyclic number.

It is not a de Polignac number, because 72430206221 - 2³⁰ = 71356464397 is a prime.

It is a super-2 number, since 2×72430206221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72430206281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529441 + ... + 1576086.

It is an arithmetic number, because the mean of its divisors is an integer number (9195468408).

Almost surely, 2^72430206221 is an apocalyptic number.

It is an amenable number.

72430206221 is a deficient number, since it is larger than the sum of its proper divisors (1133541043).

72430206221 is a wasteful number, since it uses less digits than its factorization.

72430206221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105891.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 72430206221 its reverse (12260203427), we get a palindrome (84690409648).

The spelling of 72430206221 in words is "seventy-two billion, four hundred thirty million, two hundred six thousand, two hundred twenty-one".