40215025 has 12 divisors (see below), whose sum is σ = 51587100. Its totient is φ = 31062080.

The previous prime is 40215023. The next prime is 40215031. The reversal of 40215025 is 52051204.

40215025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 9290304 + 30924721 = 3048^2 + 5561^2 .

It is not a de Polignac number, because 40215025 - 2¹ = 40215023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40214993 and 40215011.

It is not an unprimeable number, because it can be changed into a prime (40215023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27010 + ... + 28459.

It is an arithmetic number, because the mean of its divisors is an integer number (4298925).

Almost surely, 2^40215025 is an apocalyptic number.

It is an amenable number.

40215025 is a deficient number, since it is larger than the sum of its proper divisors (11372075).

40215025 is a wasteful number, since it uses less digits than its factorization.

40215025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55508 (or 55503 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 40215025 is about 6341.5317550258. The cubic root of 40215025 is about 342.6069071493.

Adding to 40215025 its reverse (52051204), we get a palindrome (92266229).

The spelling of 40215025 in words is "forty million, two hundred fifteen thousand, twenty-five".