30492521 has 2 divisors, whose sum is σ = 30492522. Its totient is φ = 30492520.

The previous prime is 30492491. The next prime is 30492523. The reversal of 30492521 is 12529403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 5382400 = 5011^2 + 2320^2 .

It is an emirp because it is prime and its reverse (12529403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30492521 is a prime.

Together with 30492523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30492523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15246260 + 15246261.

It is an arithmetic number, because the mean of its divisors is an integer number (15246261).

Almost surely, 2^30492521 is an apocalyptic number.

It is an amenable number.

30492521 is a deficient number, since it is larger than the sum of its proper divisors (1).

30492521 is an equidigital number, since it uses as much as digits as its factorization.

30492521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30492521 is about 5522.0033502344. The cubic root of 30492521 is about 312.4144482610.

It can be divided in two parts, 30492 and 521, that added together give a palindrome (31013).

The spelling of 30492521 in words is "thirty million, four hundred ninety-two thousand, five hundred twenty-one".