30229621 has 4 divisors (see below), whose sum is σ = 32007852. Its totient is φ = 28451392.

The previous prime is 30229609. The next prime is 30229631. The reversal of 30229621 is 12692203.

It is a happy number.

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 22667121 + 7562500 = 4761^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 30229621 - 2¹⁵ = 30196853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30229631) 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 3 ways as a sum of consecutive naturals, for example, 889090 + ... + 889123.

It is an arithmetic number, because the mean of its divisors is an integer number (8001963).

Almost surely, 2^30229621 is an apocalyptic number.

It is an amenable number.

30229621 is a deficient number, since it is larger than the sum of its proper divisors (1778231).

30229621 is a wasteful number, since it uses less digits than its factorization.

30229621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778230.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30229621 is about 5498.1470515074. The cubic root of 30229621 is about 311.5139985825.

The spelling of 30229621 in words is "thirty million, two hundred twenty-nine thousand, six hundred twenty-one".