40643525 has 24 divisors (see below), whose sum is σ = 54996480. Its totient is φ = 29615040.

The previous prime is 40643509. The next prime is 40643531. The reversal of 40643525 is 52534604.

40643525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40643525 - 2⁴ = 40643509 is a prime.

It is a super-2 number, since 2×40643525² = 3303792248851250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 24884 + ... + 26466.

It is an arithmetic number, because the mean of its divisors is an integer number (2291520).

Almost surely, 2^40643525 is an apocalyptic number.

It is an amenable number.

40643525 is a deficient number, since it is larger than the sum of its proper divisors (14352955).

40643525 is a wasteful number, since it uses less digits than its factorization.

40643525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 40643525 is about 6375.2274469230. The cubic root of 40643525 is about 343.8194614451.

The spelling of 40643525 in words is "forty million, six hundred forty-three thousand, five hundred twenty-five".