30218572 has 12 divisors (see below), whose sum is σ = 52965360. Its totient is φ = 15085616.

The previous prime is 30218567. The next prime is 30218579. The reversal of 30218572 is 27581203.

It is a self number, because there is not a number n which added to its sum of digits gives 30218572.

It is not an unprimeable number, because it can be changed into a prime (30218579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2872 + ... + 8287.

It is an arithmetic number, because the mean of its divisors is an integer number (4413780).

Almost surely, 2^30218572 is an apocalyptic number.

It is an amenable number.

30218572 is a deficient number, since it is larger than the sum of its proper divisors (22746788).

30218572 is a wasteful number, since it uses less digits than its factorization.

30218572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11840 (or 11838 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 30218572 is about 5497.1421666171. The cubic root of 30218572 is about 311.4760409162.

Adding to 30218572 its reverse (27581203), we get a palindrome (57799775).

The spelling of 30218572 in words is "thirty million, two hundred eighteen thousand, five hundred seventy-two".