30645253 has 2 divisors, whose sum is σ = 30645254. Its totient is φ = 30645252.

The previous prime is 30645239. The next prime is 30645259. The reversal of 30645253 is 35254603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22591009 + 8054244 = 4753^2 + 2838^2 .

It is an emirp because it is prime and its reverse (35254603) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30645253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30645259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322626 + 15322627.

It is an arithmetic number, because the mean of its divisors is an integer number (15322627).

Almost surely, 2^30645253 is an apocalyptic number.

It is an amenable number.

30645253 is a deficient number, since it is larger than the sum of its proper divisors (1).

30645253 is an equidigital number, since it uses as much as digits as its factorization.

30645253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 30645253 is about 5535.8154774161. The cubic root of 30645253 is about 312.9351905747.

Adding to 30645253 its reverse (35254603), we get a palindrome (65899856).

The spelling of 30645253 in words is "thirty million, six hundred forty-five thousand, two hundred fifty-three".