30513221 has 8 divisors (see below), whose sum is σ = 32308320. Its totient is φ = 28737072.

The previous prime is 30513209. The next prime is 30513229. The reversal of 30513221 is 12231503.

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

It is a cyclic number.

It is not a de Polignac number, because 30513221 - 2¹⁰ = 30512197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30513221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30513229) 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 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (4038540).

Almost surely, 2^30513221 is an apocalyptic number.

It is an amenable number.

30513221 is a deficient number, since it is larger than the sum of its proper divisors (1795099).

30513221 is a wasteful number, since it uses less digits than its factorization.

30513221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9475.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 30513221 is about 5523.8773520056. The cubic root of 30513221 is about 312.4851269721.

Adding to 30513221 its reverse (12231503), we get a palindrome (42744724).

The spelling of 30513221 in words is "thirty million, five hundred thirteen thousand, two hundred twenty-one".