30221025 has 12 divisors (see below), whose sum is σ = 49965552. Its totient is φ = 16117840.

The previous prime is 30221003. The next prime is 30221033. The reversal of 30221025 is 52012203.

It is not a de Polignac number, because 30221025 - 2⁶ = 30220961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30220995 and 30221013.

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, 201399 + ... + 201548.

It is an arithmetic number, because the mean of its divisors is an integer number (4163796).

Almost surely, 2^30221025 is an apocalyptic number.

It is an amenable number.

30221025 is a deficient number, since it is larger than the sum of its proper divisors (19744527).

30221025 is a wasteful number, since it uses less digits than its factorization.

30221025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402960 (or 402955 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30221025 is about 5497.3652780218. The cubic root of 30221025 is about 311.4844687362.

Adding to 30221025 its reverse (52012203), we get a palindrome (82233228).

The spelling of 30221025 in words is "thirty million, two hundred twenty-one thousand, twenty-five".