30561224 has 8 divisors (see below), whose sum is σ = 57302310. Its totient is φ = 15280608.

The previous prime is 30561217. The next prime is 30561239. The reversal of 30561224 is 42216503.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 2280100 = 5318^2 + 1510^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 30561224.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910069 + ... + 1910084.

Almost surely, 2^30561224 is an apocalyptic number.

It is an amenable number.

30561224 is a deficient number, since it is larger than the sum of its proper divisors (26741086).

30561224 is a wasteful number, since it uses less digits than its factorization.

30561224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820159 (or 3820155 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 30561224 is about 5528.2206902402. The cubic root of 30561224 is about 312.6489069542.

Adding to 30561224 its reverse (42216503), we get a palindrome (72777727).

The spelling of 30561224 in words is "thirty million, five hundred sixty-one thousand, two hundred twenty-four".