30220947 has 12 divisors (see below), whose sum is σ = 43701424. Its totient is φ = 20124720.

The previous prime is 30220933. The next prime is 30220961. The reversal of 30220947 is 74902203.

It is an interprime number because it is at equal distance from previous prime (30220933) and next prime (30220961).

It is not a de Polignac number, because 30220947 - 2²⁰ = 29172371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30220947.

It is not an unprimeable number, because it can be changed into a prime (30220907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11922 + ... + 14232.

Almost surely, 2^30220947 is an apocalyptic number.

30220947 is a deficient number, since it is larger than the sum of its proper divisors (13480477).

30220947 is a wasteful number, since it uses less digits than its factorization.

30220947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770 (or 3767 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30220947 is about 5497.3581837097. The cubic root of 30220947 is about 311.4842007571.

The spelling of 30220947 in words is "thirty million, two hundred twenty thousand, nine hundred forty-seven".