30001252521 has 16 divisors (see below), whose sum is σ = 42343392960. Its totient is φ = 18862052160.

The previous prime is 30001252499. The next prime is 30001252621. The reversal of 30001252521 is 12525210003.

It is not a de Polignac number, because 30001252521 - 2⁹ = 30001252009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30001252321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4006050 + ... + 4013531.

It is an arithmetic number, because the mean of its divisors is an integer number (2646462060).

Almost surely, 2^30001252521 is an apocalyptic number.

It is an amenable number.

30001252521 is a deficient number, since it is larger than the sum of its proper divisors (12342140439).

30001252521 is a wasteful number, since it uses less digits than its factorization.

30001252521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8019656.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 30001252521 its reverse (12525210003), we get a palindrome (42526462524).

It can be divided in two parts, 3000 and 1252521, that added together give a palindrome (1255521).

The spelling of 30001252521 in words is "thirty billion, one million, two hundred fifty-two thousand, five hundred twenty-one".