40505511 has 8 divisors (see below), whose sum is σ = 56849920. Its totient is φ = 25582392.

The previous prime is 40505477. The next prime is 40505519. The reversal of 40505511 is 11550504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40505511 - 2¹⁹ = 39981223 is a prime.

It is a super-2 number, since 2×40505511² = 3281392842742242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355255 + ... + 355368.

It is an arithmetic number, because the mean of its divisors is an integer number (7106240).

Almost surely, 2^40505511 is an apocalyptic number.

40505511 is a deficient number, since it is larger than the sum of its proper divisors (16344409).

40505511 is a wasteful number, since it uses less digits than its factorization.

40505511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710645.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 40505511 is about 6364.3940010028. The cubic root of 40505511 is about 343.4298486526.

The spelling of 40505511 in words is "forty million, five hundred five thousand, five hundred eleven".