30745205 has 4 divisors (see below), whose sum is σ = 36894252. Its totient is φ = 24596160.

The previous prime is 30745193. The next prime is 30745207. The reversal of 30745205 is 50254703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23990404 + 6754801 = 4898^2 + 2599^2 .

It is not a de Polignac number, because 30745205 - 2⁸ = 30744949 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30745207) 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 in 3 ways as a sum of consecutive naturals, for example, 3074516 + ... + 3074525.

It is an arithmetic number, because the mean of its divisors is an integer number (9223563).

Almost surely, 2^30745205 is an apocalyptic number.

It is an amenable number.

30745205 is a deficient number, since it is larger than the sum of its proper divisors (6149047).

30745205 is an equidigital number, since it uses as much as digits as its factorization.

30745205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149046.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 30745205 is about 5544.8358857589. The cubic root of 30745205 is about 313.2750425996.

Adding to 30745205 its reverse (50254703), we get a palindrome (80999908).

The spelling of 30745205 in words is "thirty million, seven hundred forty-five thousand, two hundred five".