30221145 has 12 divisors (see below), whose sum is σ = 52383396. Its totient is φ = 16117920.

The previous prime is 30221143. The next prime is 30221167. The reversal of 30221145 is 54112203.

It can be written as a sum of positive squares in 2 ways, for example, as 11532816 + 18688329 = 3396^2 + 4323^2 .

It is not a de Polignac number, because 30221145 - 2¹ = 30221143 is a prime.

It is a super-2 number, since 2×30221145² = 1826635210222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30221143) 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 11 ways as a sum of consecutive naturals, for example, 335746 + ... + 335835.

It is an arithmetic number, because the mean of its divisors is an integer number (4365283).

Almost surely, 2^30221145 is an apocalyptic number.

It is an amenable number.

30221145 is a deficient number, since it is larger than the sum of its proper divisors (22162251).

30221145 is a wasteful number, since it uses less digits than its factorization.

30221145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671592 (or 671589 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30221145 is about 5497.3761923303. The cubic root of 30221145 is about 311.4848810108.

Adding to 30221145 its reverse (54112203), we get a palindrome (84333348).

The spelling of 30221145 in words is "thirty million, two hundred twenty-one thousand, one hundred forty-five".