30523225 has 12 divisors (see below), whose sum is σ = 39154860. Its totient is φ = 23576000.

The previous prime is 30523223. The next prime is 30523247. The reversal of 30523225 is 52232503.

It can be written as a sum of positive squares in 6 ways, for example, as 8649 + 30514576 = 93^2 + 5524^2 .

It is not a de Polignac number, because 30523225 - 2¹ = 30523223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30523196 and 30523205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30523223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20326 + ... + 21775.

It is an arithmetic number, because the mean of its divisors is an integer number (3262905).

Almost surely, 2^30523225 is an apocalyptic number.

It is an amenable number.

30523225 is a deficient number, since it is larger than the sum of its proper divisors (8631635).

30523225 is a wasteful number, since it uses less digits than its factorization.

30523225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42140 (or 42135 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 30523225 is about 5524.7828011606. The cubic root of 30523225 is about 312.5192734779.

Adding to 30523225 its reverse (52232503), we get a palindrome (82755728).

The spelling of 30523225 in words is "thirty million, five hundred twenty-three thousand, two hundred twenty-five".