40501521 has 24 divisors (see below), whose sum is σ = 61836320. Its totient is φ = 25474176.

The previous prime is 40501519. The next prime is 40501529. The reversal of 40501521 is 12510504.

It is not a de Polignac number, because 40501521 - 2¹ = 40501519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40501494 and 40501503.

It is not an unprimeable number, because it can be changed into a prime (40501529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73770 + ... + 74316.

Almost surely, 2^40501521 is an apocalyptic number.

It is an amenable number.

40501521 is a deficient number, since it is larger than the sum of its proper divisors (21334799).

40501521 is a wasteful number, since it uses less digits than its factorization.

40501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 40501521 is about 6364.0805306030. The cubic root of 40501521 is about 343.4185717501.

The spelling of 40501521 in words is "forty million, five hundred one thousand, five hundred twenty-one".