40521530 has 48 divisors (see below), whose sum is σ = 86959656. Its totient is φ = 13547520.

The previous prime is 40521529. The next prime is 40521541. The reversal of 40521530 is 3512504.

It can be written as a sum of positive squares in 4 ways, for example, as 29278921 + 11242609 = 5411^2 + 3353^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19082 + ... + 21098.

Almost surely, 2^40521530 is an apocalyptic number.

40521530 is an abundant number, since it is smaller than the sum of its proper divisors (46438126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40521530 is a wasteful number, since it uses less digits than its factorization.

40521530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40521530 is about 6365.6523624841. The cubic root of 40521530 is about 343.4751155603.

The spelling of 40521530 in words is "forty million, five hundred twenty-one thousand, five hundred thirty".