40135525 has 6 divisors (see below), whose sum is σ = 49768082. Its totient is φ = 32108400.

The previous prime is 40135523. The next prime is 40135547. The reversal of 40135525 is 52553104.

40135525 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 3 ways, for example, as 784996 + 39350529 = 886^2 + 6273^2 .

It is not a de Polignac number, because 40135525 - 2¹ = 40135523 is a prime.

It is a super-2 number, since 2×40135525² = 3221720734051250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1605421 = 40135525 / (4 + 0 + 1 + 3 + 5 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40135525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135523) 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 5 ways as a sum of consecutive naturals, for example, 802686 + ... + 802735.

Almost surely, 2^40135525 is an apocalyptic number.

It is an amenable number.

40135525 is a deficient number, since it is larger than the sum of its proper divisors (9632557).

40135525 is a wasteful number, since it uses less digits than its factorization.

40135525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605431 (or 1605426 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 40135525 is about 6335.2604524202. The cubic root of 40135525 is about 342.3809947608.

Adding to 40135525 its reverse (52553104), we get a palindrome (92688629).

The spelling of 40135525 in words is "forty million, one hundred thirty-five thousand, five hundred twenty-five".