40511 has 4 divisors (see below), whose sum is σ = 42912. Its totient is φ = 38112.

The previous prime is 40507. The next prime is 40519. The reversal of 40511 is 11504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40511 - 2² = 40507 is a prime.

It is a super-2 number, since 2×40511² = 3282282242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40492 and 40501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40519) 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 3 ways as a sum of consecutive naturals, for example, 1175 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (10728).

2⁴⁰⁵¹¹ is an apocalyptic number.

40511 is a deficient number, since it is larger than the sum of its proper divisors (2401).

40511 is a wasteful number, since it uses less digits than its factorization.

40511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 40511 is about 201.2734458392. The cubic root of 40511 is about 34.3445360956.

The spelling of 40511 in words is "forty thousand, five hundred eleven".