30220971 has 32 divisors (see below), whose sum is σ = 46096128. Its totient is φ = 17447040.

The previous prime is 30220961. The next prime is 30220997. The reversal of 30220971 is 17902203.

It is not a de Polignac number, because 30220971 - 2⁶ = 30220907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30220961) 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 31 ways as a sum of consecutive naturals, for example, 64480 + ... + 64946.

It is an arithmetic number, because the mean of its divisors is an integer number (1440504).

Almost surely, 2^30220971 is an apocalyptic number.

30220971 is a deficient number, since it is larger than the sum of its proper divisors (15875157).

30220971 is a wasteful number, since it uses less digits than its factorization.

30220971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 30220971 is about 5497.3603665759. The cubic root of 30220971 is about 311.4842832123.

The spelling of 30220971 in words is "thirty million, two hundred twenty thousand, nine hundred seventy-one".