30221125 has 32 divisors (see below), whose sum is σ = 42531840. Its totient is φ = 21240000.

The previous prime is 30221123. The next prime is 30221137. The reversal of 30221125 is 52112203.

It is not a de Polignac number, because 30221125 - 2¹ = 30221123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30221099 and 30221108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42271 + ... + 42979.

It is an arithmetic number, because the mean of its divisors is an integer number (1329120).

Almost surely, 2^30221125 is an apocalyptic number.

It is an amenable number.

30221125 is a deficient number, since it is larger than the sum of its proper divisors (12310715).

30221125 is a wasteful number, since it uses less digits than its factorization.

30221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 30221125 is about 5497.3743732804. The cubic root of 30221125 is about 311.4848122985.

Adding to 30221125 its reverse (52112203), we get a palindrome (82333328).

The spelling of 30221125 in words is "thirty million, two hundred twenty-one thousand, one hundred twenty-five".