40205225 has 6 divisors (see below), whose sum is σ = 49854510. Its totient is φ = 32164160.

The previous prime is 40205213. The next prime is 40205237. The reversal of 40205225 is 52250204.

It is an interprime number because it is at equal distance from previous prime (40205213) and next prime (40205237).

It can be written as a sum of positive squares in 3 ways, for example, as 5583769 + 34621456 = 2363^2 + 5884^2 .

It is not a de Polignac number, because 40205225 - 2¹⁶ = 40139689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40205197 and 40205206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 804080 + ... + 804129.

It is an arithmetic number, because the mean of its divisors is an integer number (8309085).

Almost surely, 2^40205225 is an apocalyptic number.

It is an amenable number.

40205225 is a deficient number, since it is larger than the sum of its proper divisors (9649285).

40205225 is a wasteful number, since it uses less digits than its factorization.

40205225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608219 (or 1608214 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40205225 is about 6340.7590239655. The cubic root of 40205225 is about 342.5790749277.

Adding to 40205225 its reverse (52250204), we get a palindrome (92455429).

The spelling of 40205225 in words is "forty million, two hundred five thousand, two hundred twenty-five".