30521225 has 12 divisors (see below), whose sum is σ = 43253184. Its totient is φ = 20928720.

The previous prime is 30521209. The next prime is 30521243. The reversal of 30521225 is 52212503.

It is not a de Polignac number, because 30521225 - 2⁴ = 30521209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30521197 and 30521206.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87029 + ... + 87378.

It is an arithmetic number, because the mean of its divisors is an integer number (3604432).

Almost surely, 2^30521225 is an apocalyptic number.

30521225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30521225 is a deficient number, since it is larger than the sum of its proper divisors (12731959).

30521225 is a wasteful number, since it uses less digits than its factorization.

30521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174424 (or 174419 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30521225 is about 5524.6017956048. The cubic root of 30521225 is about 312.5124475042.

Adding to 30521225 its reverse (52212503), we get a palindrome (82733728).

The spelling of 30521225 in words is "thirty million, five hundred twenty-one thousand, two hundred twenty-five".