30221345 has 16 divisors (see below), whose sum is σ = 45214848. Its totient is φ = 18839040.

The previous prime is 30221281. The next prime is 30221351. The reversal of 30221345 is 54312203.

It is a happy number.

It is not a de Polignac number, because 30221345 - 2⁶ = 30221281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38864 + ... + 39633.

It is an arithmetic number, because the mean of its divisors is an integer number (2825928).

Almost surely, 2^30221345 is an apocalyptic number.

30221345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30221345 is a deficient number, since it is larger than the sum of its proper divisors (14993503).

30221345 is a wasteful number, since it uses less digits than its factorization.

30221345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78520.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30221345 is about 5497.3943827963. The cubic root of 30221345 is about 311.4855681328.

Adding to 30221345 its reverse (54312203), we get a palindrome (84533548).

The spelling of 30221345 in words is "thirty million, two hundred twenty-one thousand, three hundred forty-five".