40115525 has 6 divisors (see below), whose sum is σ = 49743282. Its totient is φ = 32092400.

The previous prime is 40115503. The next prime is 40115527. The reversal of 40115525 is 52551104.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3161284 + 36954241 = 1778^2 + 6079^2 .

It is not a de Polignac number, because 40115525 - 2²⁴ = 23338309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40115525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115527) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 802286 + ... + 802335.

It is an arithmetic number, because the mean of its divisors is an integer number (8290547).

Almost surely, 2^40115525 is an apocalyptic number.

It is an amenable number.

40115525 is a deficient number, since it is larger than the sum of its proper divisors (9627757).

40115525 is a wasteful number, since it uses less digits than its factorization.

40115525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604631 (or 1604626 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 40115525 is about 6333.6817886597. The cubic root of 40115525 is about 342.3241144980.

Adding to 40115525 its reverse (52551104), we get a palindrome (92666629).

The spelling of 40115525 in words is "forty million, one hundred fifteen thousand, five hundred twenty-five".