30530133552521 has 16 divisors (see below), whose sum is σ = 31645174674960. Its totient is φ = 29419284034560.

The previous prime is 30530133552511. The next prime is 30530133552557. The reversal of 30530133552521 is 12525533103503.

It can be written as a sum of positive squares in 8 ways, for example, as 51342574921 + 30478790977600 = 226589^2 + 5520760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30530133552521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30530133552511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42841901 + ... + 43548693.

It is an arithmetic number, because the mean of its divisors is an integer number (1977823417185).

Almost surely, 2^{30530133552521} is an apocalyptic number.

It is an amenable number.

30530133552521 is a deficient number, since it is larger than the sum of its proper divisors (1115041122439).

30530133552521 is a wasteful number, since it uses less digits than its factorization.

30530133552521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709756.

The product of its (nonzero) digits is 202500, while the sum is 38.

The spelling of 30530133552521 in words is "thirty trillion, five hundred thirty billion, one hundred thirty-three million, five hundred fifty-two thousand, five hundred twenty-one".