30251440221 has 16 divisors (see below), whose sum is σ = 40472678400. Its totient is φ = 20098976688.

The previous prime is 30251440213. The next prime is 30251440237. The reversal of 30251440221 is 12204415203.

It is not a de Polignac number, because 30251440221 - 2³ = 30251440213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30251440191 and 30251440200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30251447221) 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, 2324310 + ... + 2337288.

It is an arithmetic number, because the mean of its divisors is an integer number (2529542400).

Almost surely, 2^30251440221 is an apocalyptic number.

It is an amenable number.

30251440221 is a deficient number, since it is larger than the sum of its proper divisors (10221238179).

30251440221 is a wasteful number, since it uses less digits than its factorization.

30251440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15568.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 30251440221 its reverse (12204415203), we get a palindrome (42455855424).

The spelling of 30251440221 in words is "thirty billion, two hundred fifty-one million, four hundred forty thousand, two hundred twenty-one".