30153481 has 4 divisors (see below), whose sum is σ = 30250132. Its totient is φ = 30056832.

The previous prime is 30153469. The next prime is 30153499. The reversal of 30153481 is 18435103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3980025 + 26173456 = 1995^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 30153481 - 2¹³ = 30145289 is a prime.

It is a super-2 number, since 2×30153481² = 1818464832834722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30153451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47856 + ... + 48481.

It is an arithmetic number, because the mean of its divisors is an integer number (7562533).

Almost surely, 2^30153481 is an apocalyptic number.

It is an amenable number.

30153481 is a deficient number, since it is larger than the sum of its proper divisors (96651).

30153481 is an equidigital number, since it uses as much as digits as its factorization.

30153481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96650.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 30153481 is about 5491.2185350794. The cubic root of 30153481 is about 311.2522396789.

Adding to 30153481 its reverse (18435103), we get a palindrome (48588584).

The spelling of 30153481 in words is "thirty million, one hundred fifty-three thousand, four hundred eighty-one".