30221625 has 64 divisors (see below), whose sum is σ = 59604480. Its totient is φ = 13305600.

The previous prime is 30221617. The next prime is 30221627. The reversal of 30221625 is 52612203.

It is not a de Polignac number, because 30221625 - 2³ = 30221617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (30221627) 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 63 ways as a sum of consecutive naturals, for example, 75927 + ... + 76323.

It is an arithmetic number, because the mean of its divisors is an integer number (931320).

Almost surely, 2^30221625 is an apocalyptic number.

30221625 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30221625 is a deficient number, since it is larger than the sum of its proper divisors (29382855).

30221625 is a wasteful number, since it uses less digits than its factorization.

30221625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30221625 is about 5497.4198493475. The cubic root of 30221625 is about 311.4865300985.

Adding to 30221625 its reverse (52612203), we get a palindrome (82833828).

The spelling of 30221625 in words is "thirty million, two hundred twenty-one thousand, six hundred twenty-five".