30705225 has 24 divisors (see below), whose sum is σ = 51952032. Its totient is φ = 15993600.

The previous prime is 30705223. The next prime is 30705263. The reversal of 30705225 is 52250703.

It is not a de Polignac number, because 30705225 - 2¹ = 30705223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30705195 and 30705204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30705223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1536 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (2164668).

Almost surely, 2^30705225 is an apocalyptic number.

It is an amenable number.

30705225 is a deficient number, since it is larger than the sum of its proper divisors (21246807).

30705225 is a wasteful number, since it uses less digits than its factorization.

30705225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577 (or 9572 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 30705225 is about 5541.2295566959. The cubic root of 30705225 is about 313.1391930252.

Adding to 30705225 its reverse (52250703), we get a palindrome (82955928).

The spelling of 30705225 in words is "thirty million, seven hundred five thousand, two hundred twenty-five".