30225561 has 16 divisors (see below), whose sum is σ = 43122240. Its totient is φ = 18774720.

The previous prime is 30225553. The next prime is 30225581. The reversal of 30225561 is 16552203.

It is not a de Polignac number, because 30225561 - 2³ = 30225553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30225521) 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 15 ways as a sum of consecutive naturals, for example, 870 + ... + 7823.

It is an arithmetic number, because the mean of its divisors is an integer number (2695140).

Almost surely, 2^30225561 is an apocalyptic number.

It is an amenable number.

30225561 is a deficient number, since it is larger than the sum of its proper divisors (12896679).

30225561 is a wasteful number, since it uses less digits than its factorization.

30225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8776.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 30225561 is about 5497.7778238121. Note that the first 3 decimals coincide. The cubic root of 30225561 is about 311.5000519587.

Adding to 30225561 its reverse (16552203), we get a palindrome (46777764).

The spelling of 30225561 in words is "thirty million, two hundred twenty-five thousand, five hundred sixty-one".