30221971 has 8 divisors (see below), whose sum is σ = 34461504. Its totient is φ = 26256000.

The previous prime is 30221969. The next prime is 30222011. The reversal of 30221971 is 17912203.

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 30221971 - 2¹ = 30221969 is a prime.

It is a super-2 number, since 2×30221971² = 1826735062249682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30221911) 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 7 ways as a sum of consecutive naturals, for example, 68155 + ... + 68596.

It is an arithmetic number, because the mean of its divisors is an integer number (4307688).

Almost surely, 2^30221971 is an apocalyptic number.

30221971 is a deficient number, since it is larger than the sum of its proper divisors (4239533).

30221971 is a wasteful number, since it uses less digits than its factorization.

30221971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136781.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 30221971 is about 5497.4513185657. The cubic root of 30221971 is about 311.4877188050.

The spelling of 30221971 in words is "thirty million, two hundred twenty-one thousand, nine hundred seventy-one".