40020225 has 48 divisors (see below), whose sum is σ = 78090240. Its totient is φ = 17697600.

The previous prime is 40020221. The next prime is 40020257. The reversal of 40020225 is 52202004.

It is not a de Polignac number, because 40020225 - 2² = 40020221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40020221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15046 + ... + 17504.

It is an arithmetic number, because the mean of its divisors is an integer number (1626880).

Almost surely, 2^40020225 is an apocalyptic number.

It is an amenable number.

40020225 is a deficient number, since it is larger than the sum of its proper divisors (38070015).

40020225 is a wasteful number, since it uses less digits than its factorization.

40020225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2505 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40020225 is about 6326.1540449154. The cubic root of 40020225 is about 342.0528200625.

Adding to 40020225 its reverse (52202004), we get a palindrome (92222229).

The spelling of 40020225 in words is "forty million, twenty thousand, two hundred twenty-five".