30000009281 has 10 divisors (see below), whose sum is σ = 32999821410. Its totient is φ = 27272722400.

The previous prime is 30000009271. The next prime is 30000009317. The reversal of 30000009281 is 18290000003.

It can be written as a sum of positive squares in only one way, i.e., 18662018881 + 11337990400 = 136609^2 + 106480^2 .

It is not a de Polignac number, because 30000009281 - 2⁶ = 30000009217 is a prime.

It is a super-2 number, since 2×30000009281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30000009271) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1009880 + ... + 1039161.

It is an arithmetic number, because the mean of its divisors is an integer number (3299982141).

Almost surely, 2^30000009281 is an apocalyptic number.

It is an amenable number.

30000009281 is a deficient number, since it is larger than the sum of its proper divisors (2999812129).

30000009281 is an frugal number, since it uses more digits than its factorization.

30000009281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049085 (or 2049052 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 30000009281 its reverse (18290000003), we get a palindrome (48290009284).

The spelling of 30000009281 in words is "thirty billion, nine thousand, two hundred eighty-one".