23205225 has 12 divisors (see below), whose sum is σ = 38366096. Its totient is φ = 12376080.

The previous prime is 23205199. The next prime is 23205233. The reversal of 23205225 is 52250232.

23205225 = T₃₃₇ + T₃₃₈ + ... + T₅₆₁.

It is not a de Polignac number, because 23205225 - 2¹¹ = 23203177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 154627 + ... + 154776.

Almost surely, 2^23205225 is an apocalyptic number.

23205225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23205225 is a deficient number, since it is larger than the sum of its proper divisors (15160871).

23205225 is a wasteful number, since it uses less digits than its factorization.

23205225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309416 (or 309411 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 23205225 is about 4817.1801917719. The cubic root of 23205225 is about 285.2300389576.

Adding to 23205225 its reverse (52250232), we get a palindrome (75455457).

The spelling of 23205225 in words is "twenty-three million, two hundred five thousand, two hundred twenty-five".