30221245 has 4 divisors (see below), whose sum is σ = 36265500. Its totient is φ = 24176992.

The previous prime is 30221239. The next prime is 30221251. The reversal of 30221245 is 54212203.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (30221239) and next prime (30221251).

It can be written as a sum of positive squares in 2 ways, for example, as 13089924 + 17131321 = 3618^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221245 - 2⁷ = 30221117 is a prime.

It is a super-3 number, since 3×30221245³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3022120 + ... + 3022129.

It is an arithmetic number, because the mean of its divisors is an integer number (9066375).

Almost surely, 2^30221245 is an apocalyptic number.

It is an amenable number.

30221245 is a deficient number, since it is larger than the sum of its proper divisors (6044255).

30221245 is an equidigital number, since it uses as much as digits as its factorization.

30221245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6044254.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30221245 is about 5497.3852875708. The cubic root of 30221245 is about 311.4852245722.

Adding to 30221245 its reverse (54212203), we get a palindrome (84433448).

The spelling of 30221245 in words is "thirty million, two hundred twenty-one thousand, two hundred forty-five".