30221825 has 6 divisors (see below), whose sum is σ = 37475094. Its totient is φ = 24177440.

The previous prime is 30221771. The next prime is 30221827. The reversal of 30221825 is 52812203.

It can be written as a sum of positive squares in 3 ways, for example, as 758641 + 29463184 = 871^2 + 5428^2 .

It is not a de Polignac number, because 30221825 - 2¹² = 30217729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30221825.

It is not an unprimeable number, because it can be changed into a prime (30221827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604412 + ... + 604461.

It is an arithmetic number, because the mean of its divisors is an integer number (6245849).

Almost surely, 2^30221825 is an apocalyptic number.

It is an amenable number.

30221825 is a deficient number, since it is larger than the sum of its proper divisors (7253269).

30221825 is a wasteful number, since it uses less digits than its factorization.

30221825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208883 (or 1208878 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 30221825 is about 5497.4380396690. The cubic root of 30221825 is about 311.4872172132.

The spelling of 30221825 in words is "thirty million, two hundred twenty-one thousand, eight hundred twenty-five".