30113521 has 4 divisors (see below), whose sum is σ = 30175344. Its totient is φ = 30051700.

The previous prime is 30113519. The next prime is 30113533. The reversal of 30113521 is 12531103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30113521 - 2¹ = 30113519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30113495 and 30113504.

It is not an unprimeable number, because it can be changed into a prime (30113581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30175 + ... + 31156.

It is an arithmetic number, because the mean of its divisors is an integer number (7543836).

Almost surely, 2^30113521 is an apocalyptic number.

It is an amenable number.

30113521 is a deficient number, since it is larger than the sum of its proper divisors (61823).

30113521 is an equidigital number, since it uses as much as digits as its factorization.

30113521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61822.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 30113521 is about 5487.5787921450. The cubic root of 30113521 is about 311.1146863204.

Adding to 30113521 its reverse (12531103), we get a palindrome (42644624).

The spelling of 30113521 in words is "thirty million, one hundred thirteen thousand, five hundred twenty-one".