30052521 has 6 divisors (see below), whose sum is σ = 43409210. Its totient is φ = 20035008.

The previous prime is 30052511. The next prime is 30052523. The reversal of 30052521 is 12525003.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 404496 = 5445^2 + 636^2 .

It is not a de Polignac number, because 30052521 - 2¹⁷ = 29921449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30052494 and 30052503.

It is not an unprimeable number, because it can be changed into a prime (30052523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1669576 + ... + 1669593.

Almost surely, 2^30052521 is an apocalyptic number.

It is an amenable number.

30052521 is a deficient number, since it is larger than the sum of its proper divisors (13356689).

30052521 is a wasteful number, since it uses less digits than its factorization.

30052521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339175 (or 3339172 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30052521 is about 5482.0179678655. The cubic root of 30052521 is about 310.9044726130.

Adding to 30052521 its reverse (12525003), we get a palindrome (42577524).

The spelling of 30052521 in words is "thirty million, fifty-two thousand, five hundred twenty-one".