30144442081 has 4 divisors (see below), whose sum is σ = 32463245332. Its totient is φ = 27825638832.

The previous prime is 30144442079. The next prime is 30144442103. The reversal of 30144442081 is 18024444103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18024444103 = 53 ⋅340083851.

It can be written as a sum of positive squares in 2 ways, for example, as 5048813025 + 25095629056 = 71055^2 + 158416^2 .

It is a cyclic number.

It is not a de Polignac number, because 30144442081 - 2¹ = 30144442079 is a prime.

It is a super-2 number, since 2×30144442081² (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 (30144442061) 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, 1159401606 + ... + 1159401631.

It is an arithmetic number, because the mean of its divisors is an integer number (8115811333).

Almost surely, 2^30144442081 is an apocalyptic number.

It is an amenable number.

30144442081 is a deficient number, since it is larger than the sum of its proper divisors (2318803251).

30144442081 is a wasteful number, since it uses less digits than its factorization.

30144442081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318803250.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 30144442081 its reverse (18024444103), we get a palindrome (48168886184).

The spelling of 30144442081 in words is "thirty billion, one hundred forty-four million, four hundred forty-two thousand, eighty-one".