30518641 has 2 divisors, whose sum is σ = 30518642. Its totient is φ = 30518640.

The previous prime is 30518639. The next prime is 30518659. The reversal of 30518641 is 14681503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 2903616 = 5255^2 + 1704^2 .

It is an emirp because it is prime and its reverse (14681503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30518641 - 2¹ = 30518639 is a prime.

Together with 30518639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30518681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15259320 + 15259321.

It is an arithmetic number, because the mean of its divisors is an integer number (15259321).

Almost surely, 2^30518641 is an apocalyptic number.

It is an amenable number.

30518641 is a deficient number, since it is larger than the sum of its proper divisors (1).

30518641 is an equidigital number, since it uses as much as digits as its factorization.

30518641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 30518641 is about 5524.3679276457. The cubic root of 30518641 is about 312.5036279045.

It can be divided in two parts, 30 and 518641, that added together give a triangular number (518671 = T₁₀₁₈).

The spelling of 30518641 in words is "thirty million, five hundred eighteen thousand, six hundred forty-one".