30131481 has 8 divisors (see below), whose sum is σ = 40204224. Its totient is φ = 20073200.

The previous prime is 30131471. The next prime is 30131483. The reversal of 30131481 is 18413103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30131481 is a prime.

It is a super-2 number, since 2×30131481² = 1815812294506722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30131483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2956 + ... + 8306.

It is an arithmetic number, because the mean of its divisors is an integer number (5025528).

Almost surely, 2^30131481 is an apocalyptic number.

It is an amenable number.

30131481 is a deficient number, since it is larger than the sum of its proper divisors (10072743).

30131481 is a wasteful number, since it uses less digits than its factorization.

30131481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7231.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30131481 is about 5489.2149711958. The cubic root of 30131481 is about 311.1765246476.

Adding to 30131481 its reverse (18413103), we get a palindrome (48544584).

The spelling of 30131481 in words is "thirty million, one hundred thirty-one thousand, four hundred eighty-one".