72430130221 has 4 divisors (see below), whose sum is σ = 72834768000. Its totient is φ = 72025492444.

The previous prime is 72430130191. The next prime is 72430130233. The reversal of 72430130221 is 12203103427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12203103427 = 149 ⋅81900023.

It is a cyclic number.

It is not a de Polignac number, because 72430130221 - 2¹³ = 72430122029 is a prime.

It is a super-2 number, since 2×72430130221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72430134221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202318621 + ... + 202318978.

It is an arithmetic number, because the mean of its divisors is an integer number (18208692000).

Almost surely, 2^72430130221 is an apocalyptic number.

It is an amenable number.

72430130221 is a deficient number, since it is larger than the sum of its proper divisors (404637779).

72430130221 is a wasteful number, since it uses less digits than its factorization.

72430130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404637778.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 72430130221 its reverse (12203103427), we get a palindrome (84633233648).

The spelling of 72430130221 in words is "seventy-two billion, four hundred thirty million, one hundred thirty thousand, two hundred twenty-one".