40475521 has 16 divisors (see below), whose sum is σ = 44364240. Its totient is φ = 36771840.

The previous prime is 40475489. The next prime is 40475537. The reversal of 40475521 is 12557404.

It can be written as a sum of positive squares in 8 ways, for example, as 17808400 + 22667121 = 4220^2 + 4761^2 .

It is a cyclic number.

It is not a de Polignac number, because 40475521 - 2⁵ = 40475489 is a prime.

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 40475521.

It is not an unprimeable number, because it can be changed into a prime (40475321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143901 + ... + 144181.

It is an arithmetic number, because the mean of its divisors is an integer number (2772765).

Almost surely, 2^40475521 is an apocalyptic number.

It is an amenable number.

40475521 is a deficient number, since it is larger than the sum of its proper divisors (3888719).

40475521 is a wasteful number, since it uses less digits than its factorization.

40475521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 40475521 is about 6362.0374881008. The cubic root of 40475521 is about 343.3450700316.

The spelling of 40475521 in words is "forty million, four hundred seventy-five thousand, five hundred twenty-one".